Flutter firebase auth 307 error

hi,

databases:

  • name: forlegacy
    databaseName: forlegacy
    user: forlegacy
    region: singapore

services:

  • type: web
    name: forlegacy
    runtime: python
    env: python
    region: singapore
    buildCommand: “./build.sh”
    startCommand: “gunicorn config.wsgi:application”
    envVars:
    • key: DATABASE_URL
      fromDatabase:
      name: forlegacy
      property: connectionString
    • key: SECRET_KEY
      generateValue: true
    • key: WEB_CONCURRENCY
      value: 4

build this code, but error

that’s solved,
I fault,
http > https