supabase/examples/auth/quickstarts/expo-react-native-social-auth/lib/supabase.ts

import { createClient } from '@supabase/supabase-js'
import { deleteItemAsync, getItemAsync, setItemAsync } from 'expo-secure-store'

const ExpoSecureStoreAdapter = {
  getItem: (key: string) => {
    console.debug('getItem', { key, getItemAsync })
    return getItemAsync(key)
  },
  setItem: (key: string, value: string) => {
    if (value.length > 2048) {
      console.warn(
        'Value being stored in SecureStore is larger than 2048 bytes and it may not be stored successfully. In a future SDK version, this call may throw an error.'
      )
    }
    return setItemAsync(key, value)
  },
  removeItem: (key: string) => {
    return deleteItemAsync(key)
  },
}

export const supabase = createClient(
  process.env.EXPO_PUBLIC_SUPABASE_URL ?? '',
  process.env.EXPO_PUBLIC_SUPABASE_PUBLISHABLE_KEY ?? '',
  {
    auth: {
      storage: ExpoSecureStoreAdapter as any,
      autoRefreshToken: true,
      persistSession: true,
      detectSessionInUrl: false,
    },
  }
)