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This package provides all classes and functions to manage the contacts of a Google account. Access is via the Google Perons API with OAuth2 authentication. The following functionalities are supported:

• Login and authentication to the google account
• List contacts
• Search in contacts
• Filter contacts per conatct group (-> Label)
• create / edit / delete contacts
• list contact groups
• create / edit / delete contact groups
• assign /remove contacts to contact groups
• set / remove contact photos

General notes

Managing Google Contacts using the Google Person API involves three steps:

1. Create a google project at google console to get an API key and OAuth 2.0 client data
2. Login / authentication to the desired Google account
3. Sending HTTP requests to read, write or delete contact data