replace segment with posthog

packages/api/src/util.ts

@@ -40,8 +40,8 @@ export interface BackendEnv {
       secret: string
     }
   }
-  segment: {
-    writeKey: string
+  posthog: {
+    apiKey: string
   }
   intercom: {
     token: string
@@ -136,7 +136,7 @@ const nullableEnvVars = [
   'GAUTH_ANDROID_CLIENT_ID',
   'GAUTH_CLIENT_ID',
   'GAUTH_SECRET',
-  'SEGMENT_WRITE_KEY',
+  'POSTHOG_API_KEY',
   'TWITTER_BEARER_TOKEN',
   'GCS_UPLOAD_PRIVATE_BUCKET',
   'SENDER_MESSAGE',
@@ -226,8 +226,8 @@ export function getEnv(): BackendEnv {
       secret: parse('GAUTH_SECRET'),
     },
   }
-  const segment = {
-    writeKey: parse('SEGMENT_WRITE_KEY'),
+  const posthog = {
+    apiKey: parse('POSTHOG_API_KEY'),
   }
   const intercom = {
     token: parse('INTERCOM_TOKEN'),
@@ -317,7 +317,7 @@ export function getEnv(): BackendEnv {
     client,
     server,
     google,
-    segment,
+    posthog,
     intercom,
     sentry,
     jaeger,