Problem with authorization

[Sanches]

Hello everyone. My question is about the authorization. I try to listen to Gmail API using users.watch method and get the error - User not authorized to perform this action., forbidden. I enabled Gmail Api and I get client info with a scope - gmail.GmailModifyScope. But anyway I get the error. Please help me

[Marvin_Lucero]

Hi @Sanches ,

Based from the error message that you indicated,

 User not authorized to perform this action., forbidden

the user or the authenticated credentials associated with the Gmail API has no necessary permissions to perform the requested action. You can check the following the fix this issue:

1. Make sure that you have requested the appropriate scope for the Gmail API. In your case, you mentioned using gmail.GmailModifyScope, which is correct for modifying Gmail settings. However, if you're only trying to set up a watch to receive notifications, you might need the https://www.googleapis.com/auth/gmail.readonly scope instead. Double-check that your application is requesting the right scope.

2. Check if you're using the correct type of credentials. If you're accessing your own Gmail account, you should be using user credentials. If you're accessing a G Suite user's Gmail account programmatically, you might need to use a service account.

3. Even if you have the correct scope, make sure you have authorized the appropriate Gmail account with the correct permissions. When you authorize an application, you need to ensure that you've granted the necessary permissions for the actions you want to perform.

Regarding the authorization errors, you may find this documentation helpful. If none of the above steps resolve the issue, consider reaching out to Gmail API support for further assistance.