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with the things you need on every request: route filtering, session resolution timing, lifecycle hooks, and silent error handling. Call it once at startup, then use the returned function in your framework's middleware\u002Fhook system.",[625,626,632],"pre",{"className":627,"code":628,"filename":629,"language":630,"meta":631,"style":631},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { createAuthMiddleware } from 'evlog\u002Fbetter-auth'\n\nconst identify = createAuthMiddleware(auth, {\n  exclude: ['\u002Fapi\u002Fauth\u002F**', '\u002Fapi\u002Fpublic\u002F**'],\n  include: ['\u002Fapi\u002F**'],\n  maskEmail: true,\n})\n","server\u002Fmiddleware\u002Fauth-identify.ts","typescript","",[617,633,634,667,674,699,735,756,770],{"__ignoreMap":631},[635,636,639,643,647,651,654,657,660,664],"span",{"class":637,"line":638},"line",1,[635,640,642],{"class":641},"s7zQu","import",[635,644,646],{"class":645},"sMK4o"," {",[635,648,650],{"class":649},"sTEyZ"," createAuthMiddleware",[635,652,653],{"class":645}," }",[635,655,656],{"class":641}," from",[635,658,659],{"class":645}," '",[635,661,663],{"class":662},"sfazB","evlog\u002Fbetter-auth",[635,665,666],{"class":645},"'\n",[635,668,670],{"class":637,"line":669},2,[635,671,673],{"emptyLinePlaceholder":672},true,"\n",[635,675,677,681,684,687,690,693,696],{"class":637,"line":676},3,[635,678,680],{"class":679},"spNyl","const",[635,682,683],{"class":649}," identify ",[635,685,686],{"class":645},"=",[635,688,650],{"class":689},"s2Zo4",[635,691,692],{"class":649},"(auth",[635,694,695],{"class":645},",",[635,697,698],{"class":645}," {\n",[635,700,702,706,709,712,715,718,720,722,724,727,729,732],{"class":637,"line":701},4,[635,703,705],{"class":704},"swJcz","  exclude",[635,707,708],{"class":645},":",[635,710,711],{"class":649}," [",[635,713,714],{"class":645},"'",[635,716,717],{"class":662},"\u002Fapi\u002Fauth\u002F**",[635,719,714],{"class":645},[635,721,695],{"class":645},[635,723,659],{"class":645},[635,725,726],{"class":662},"\u002Fapi\u002Fpublic\u002F**",[635,728,714],{"class":645},[635,730,731],{"class":649},"]",[635,733,734],{"class":645},",\n",[635,736,738,741,743,745,747,750,752,754],{"class":637,"line":737},5,[635,739,740],{"class":704},"  include",[635,742,708],{"class":645},[635,744,711],{"class":649},[635,746,714],{"class":645},[635,748,749],{"class":662},"\u002Fapi\u002F**",[635,751,714],{"class":645},[635,753,731],{"class":649},[635,755,734],{"class":645},[635,757,759,762,764,768],{"class":637,"line":758},6,[635,760,761],{"class":704},"  maskEmail",[635,763,708],{"class":645},[635,765,767],{"class":766},"sfNiH"," true",[635,769,734],{"class":645},[635,771,773,776],{"class":637,"line":772},7,[635,774,775],{"class":645},"}",[635,777,778],{"class":649},")\n",[614,780,781,782,785,786,788,789,792],{},"The function signature is ",[617,783,784],{},"(log, headers, path?) => Promise\u003Cboolean>",". It resolves the session, calls ",[617,787,622],{},", captures timing into ",[617,790,791],{},"auth.resolvedIn",", fires lifecycle hooks, and silently catches errors so session resolution never breaks a request.",[794,795,351],"h2",{"id":796},"options",[614,798,799,800,807],{},"Inherits all ",[801,802,804,806],"a",{"href":803},"\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user#options",[617,805,622],{}," options",", plus:",[809,810,811,830],"table",{},[812,813,814],"thead",{},[815,816,817,821,824,827],"tr",{},[818,819,820],"th",{},"Option",[818,822,823],{},"Type",[818,825,826],{},"Default",[818,828,829],{},"Description",[831,832,833,854,873,892],"tbody",{},[815,834,835,841,846,851],{},[836,837,838],"td",{},[617,839,840],{},"exclude",[836,842,843],{},[617,844,845],{},"string[]",[836,847,848],{},[617,849,850],{},"['\u002Fapi\u002Fauth\u002F**']",[836,852,853],{},"Route patterns to skip (glob).",[815,855,856,861,865,870],{},[836,857,858],{},[617,859,860],{},"include",[836,862,863],{},[617,864,845],{},[836,866,867],{},[617,868,869],{},"undefined",[836,871,872],{},"If set, only matching routes are resolved.",[815,874,875,880,885,889],{},[836,876,877],{},[617,878,879],{},"onIdentify",[836,881,882],{},[617,883,884],{},"(log, session) => void",[836,886,887],{},[617,888,869],{},[836,890,891],{},"Called after successful identification.",[815,893,894,899,904,908],{},[836,895,896],{},[617,897,898],{},"onAnonymous",[836,900,901],{},[617,902,903],{},"(log) => void",[836,905,906],{},[617,907,869],{},[836,909,910],{},"Called when no session is found.",[794,912,914],{"id":913},"skip-the-routes-that-do-not-need-a-session","Skip the routes that do not need a session",[614,916,917],{},"Skip Better Auth's own routes and any public endpoints to avoid wasted database queries:",[625,919,921],{"className":627,"code":920,"language":630,"meta":631,"style":631},"const identify = createAuthMiddleware(auth, {\n  exclude: [\n    '\u002Fapi\u002Fauth\u002F**',     \u002F\u002F Better Auth itself\n    '\u002Fapi\u002Fpublic\u002F**',   \u002F\u002F Public endpoints\n    '\u002Fapi\u002Fhealth',      \u002F\u002F Health checks\n  ],\n})\n",[617,922,923,939,948,963,976,990,997],{"__ignoreMap":631},[635,924,925,927,929,931,933,935,937],{"class":637,"line":638},[635,926,680],{"class":679},[635,928,683],{"class":649},[635,930,686],{"class":645},[635,932,650],{"class":689},[635,934,692],{"class":649},[635,936,695],{"class":645},[635,938,698],{"class":645},[635,940,941,943,945],{"class":637,"line":669},[635,942,705],{"class":704},[635,944,708],{"class":645},[635,946,947],{"class":649}," [\n",[635,949,950,953,955,957,959],{"class":637,"line":676},[635,951,952],{"class":645},"    '",[635,954,717],{"class":662},[635,956,714],{"class":645},[635,958,695],{"class":645},[635,960,962],{"class":961},"sHwdD","     \u002F\u002F Better Auth itself\n",[635,964,965,967,969,971,973],{"class":637,"line":701},[635,966,952],{"class":645},[635,968,726],{"class":662},[635,970,714],{"class":645},[635,972,695],{"class":645},[635,974,975],{"class":961},"   \u002F\u002F Public endpoints\n",[635,977,978,980,983,985,987],{"class":637,"line":737},[635,979,952],{"class":645},[635,981,982],{"class":662},"\u002Fapi\u002Fhealth",[635,984,714],{"class":645},[635,986,695],{"class":645},[635,988,989],{"class":961},"      \u002F\u002F Health checks\n",[635,991,992,995],{"class":637,"line":758},[635,993,994],{"class":649},"  ]",[635,996,734],{"class":645},[635,998,999,1001],{"class":637,"line":772},[635,1000,775],{"class":645},[635,1002,778],{"class":649},[614,1004,1005],{},"For high-traffic apps, flip the model and only resolve sessions on routes that need them:",[625,1007,1009],{"className":627,"code":1008,"language":630,"meta":631,"style":631},"const identify = createAuthMiddleware(auth, {\n  include: ['\u002Fapi\u002Fdashboard\u002F**', '\u002Fapi\u002Faccount\u002F**'],\n})\n",[617,1010,1011,1027,1055],{"__ignoreMap":631},[635,1012,1013,1015,1017,1019,1021,1023,1025],{"class":637,"line":638},[635,1014,680],{"class":679},[635,1016,683],{"class":649},[635,1018,686],{"class":645},[635,1020,650],{"class":689},[635,1022,692],{"class":649},[635,1024,695],{"class":645},[635,1026,698],{"class":645},[635,1028,1029,1031,1033,1035,1037,1040,1042,1044,1046,1049,1051,1053],{"class":637,"line":669},[635,1030,740],{"class":704},[635,1032,708],{"class":645},[635,1034,711],{"class":649},[635,1036,714],{"class":645},[635,1038,1039],{"class":662},"\u002Fapi\u002Fdashboard\u002F**",[635,1041,714],{"class":645},[635,1043,695],{"class":645},[635,1045,659],{"class":645},[635,1047,1048],{"class":662},"\u002Fapi\u002Faccount\u002F**",[635,1050,714],{"class":645},[635,1052,731],{"class":649},[635,1054,734],{"class":645},[635,1056,1057,1059],{"class":637,"line":676},[635,1058,775],{"class":645},[635,1060,778],{"class":649},[614,1062,1063,1065,1066,1068,1069,1072,1073,1076,1077,1079,1080,1082],{},[617,1064,860],{}," and ",[617,1067,840],{}," use glob patterns (",[617,1070,1071],{},"*",", ",[617,1074,1075],{},"**","). Provide both if you need granular control, and ",[617,1078,840],{}," wins over ",[617,1081,860],{},".",[794,1084,1086],{"id":1085},"react-to-identification","React to identification",[614,1088,1089,1090,1092],{},"Use ",[617,1091,879],{}," to react to user identification, for example to force-keep logs for premium users via tail sampling:",[625,1094,1096],{"className":627,"code":1095,"filename":629,"language":630,"meta":631,"style":631},"const identify = createAuthMiddleware(auth, {\n  onIdentify: (log, session) => {\n    if (session.user.plan === 'enterprise') {\n      log.set({ _forceKeep: true })\n    }\n  },\n  onAnonymous: (log) => {\n    log.set({ anonymous: true })\n  },\n})\n",[617,1097,1098,1114,1141,1177,1204,1209,1214,1231,1256,1261],{"__ignoreMap":631},[635,1099,1100,1102,1104,1106,1108,1110,1112],{"class":637,"line":638},[635,1101,680],{"class":679},[635,1103,683],{"class":649},[635,1105,686],{"class":645},[635,1107,650],{"class":689},[635,1109,692],{"class":649},[635,1111,695],{"class":645},[635,1113,698],{"class":645},[635,1115,1116,1119,1121,1124,1128,1130,1133,1136,1139],{"class":637,"line":669},[635,1117,1118],{"class":689},"  onIdentify",[635,1120,708],{"class":645},[635,1122,1123],{"class":645}," (",[635,1125,1127],{"class":1126},"sHdIc","log",[635,1129,695],{"class":645},[635,1131,1132],{"class":1126}," session",[635,1134,1135],{"class":645},")",[635,1137,1138],{"class":679}," =>",[635,1140,698],{"class":645},[635,1142,1143,1146,1148,1151,1153,1156,1158,1161,1164,1166,1169,1171,1174],{"class":637,"line":676},[635,1144,1145],{"class":641},"    if",[635,1147,1123],{"class":704},[635,1149,1150],{"class":649},"session",[635,1152,1082],{"class":645},[635,1154,1155],{"class":649},"user",[635,1157,1082],{"class":645},[635,1159,1160],{"class":649},"plan",[635,1162,1163],{"class":645}," ===",[635,1165,659],{"class":645},[635,1167,1168],{"class":662},"enterprise",[635,1170,714],{"class":645},[635,1172,1173],{"class":704},") ",[635,1175,1176],{"class":645},"{\n",[635,1178,1179,1182,1184,1187,1190,1193,1196,1198,1200,1202],{"class":637,"line":701},[635,1180,1181],{"class":649},"      log",[635,1183,1082],{"class":645},[635,1185,1186],{"class":689},"set",[635,1188,1189],{"class":704},"(",[635,1191,1192],{"class":645},"{",[635,1194,1195],{"class":704}," _forceKeep",[635,1197,708],{"class":645},[635,1199,767],{"class":766},[635,1201,653],{"class":645},[635,1203,778],{"class":704},[635,1205,1206],{"class":637,"line":737},[635,1207,1208],{"class":645},"    }\n",[635,1210,1211],{"class":637,"line":758},[635,1212,1213],{"class":645},"  },\n",[635,1215,1216,1219,1221,1223,1225,1227,1229],{"class":637,"line":772},[635,1217,1218],{"class":689},"  onAnonymous",[635,1220,708],{"class":645},[635,1222,1123],{"class":645},[635,1224,1127],{"class":1126},[635,1226,1135],{"class":645},[635,1228,1138],{"class":679},[635,1230,698],{"class":645},[635,1232,1234,1237,1239,1241,1243,1245,1248,1250,1252,1254],{"class":637,"line":1233},8,[635,1235,1236],{"class":649},"    log",[635,1238,1082],{"class":645},[635,1240,1186],{"class":689},[635,1242,1189],{"class":704},[635,1244,1192],{"class":645},[635,1246,1247],{"class":704}," anonymous",[635,1249,708],{"class":645},[635,1251,767],{"class":766},[635,1253,653],{"class":645},[635,1255,778],{"class":704},[635,1257,1259],{"class":637,"line":1258},9,[635,1260,1213],{"class":645},[635,1262,1264,1266],{"class":637,"line":1263},10,[635,1265,775],{"class":645},[635,1267,778],{"class":649},[614,1269,1270,1271,1273,1274,1276,1277,1279],{},"Hooks fire after the session is resolved and ",[617,1272,622],{}," has set its fields. They run on every request that passes the ",[617,1275,860],{},"\u002F",[617,1278,840],{}," filter, so keep them fast and side-effect-free.",[1281,1282,1283,1288],"tip",{},[614,1284,1285,1286,708],{},"Common patterns for ",[617,1287,879],{},[1289,1290,1291,1295,1298],"ul",{},[1292,1293,1294],"li",{},"Force-keep audit logs for admins or high-value plans.",[1292,1296,1297],{},"Tag the request with feature flags or tenant info loaded from the session.",[1292,1299,1300],{},"Increment a per-user counter for billing.",[794,1302,1304],{"id":1303},"what-happens-when-auth-fails","What happens when auth fails",[614,1306,1307,1308,1311,1312,1065,1314,1317],{},"The middleware catches every error from ",[617,1309,1310],{},"getSession"," and logs nothing, so your request keeps flowing whether the auth backend is up or down. The wide event still includes ",[617,1313,791],{},[617,1315,1316],{},"auth.identified: false"," so you can alert on session resolution health from your dashboards.",[1319,1320,1321],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}",{"title":631,"searchDepth":669,"depth":669,"links":1323},[1324,1325,1326,1327],{"id":796,"depth":669,"text":351},{"id":913,"depth":669,"text":914},{"id":1085,"depth":669,"text":1086},{"id":1303,"depth":669,"text":1304},"Framework-agnostic factory with route filtering, session timing, and lifecycle hooks. Call it once at startup and reuse across requests.","md",[1331,1334],{"label":374,"icon":377,"to":375,"color":1332,"variant":1333},"neutral","subtle",{"label":388,"icon":117,"to":389,"color":1332,"variant":1333},{},{"title":379,"icon":382},{"title":609,"description":1328},"W5iPJDKIMXykmBxrqRGnyCbSUGNKZLZjNw0Sw3TEzU0",[1340,1342],{"title":374,"path":375,"stem":376,"description":1341,"icon":377,"children":-1},"The core building block — extract safe user fields, mask emails, and capture plugin data (organizations, roles, 2FA) from a Better Auth session.",{"title":384,"path":385,"stem":386,"description":1343,"icon":335,"children":-1},"Mirror the server-side user identity into client-side logs by watching the Better Auth session and calling setIdentity.",1791444532524]