How to contribute code？

Since iOS App's Bundle Identifier is all AppStore unique, use my own apple developer account to run code need modify Bundle Identifier, but when configured the GoogleService-Info.plist and start to login, I got the following error:

{
 "error": {
  "status": 202,
  "code": 10002,
  "description": "The request data has invalid field.",
  "extra": {
   "field": "package_name",
   "reason": "package name is invalid"
  }
 }
}

No good way yet, working on a better solution for contributors. You may change the code to send the package name as one.mixin.messenger