When you add a Gmail card to a Flow for the first time, you'll be prompted to create a connection. Connecting your account will enable you to save your account information and reuse that connection the next time you build a Flow with the connector.
Note: You can create multiple connections and manage them from your Settings page.
To create a new connection from an Event or Action card:
Click New Connection.
Enter a Connection Nickname for your Gmail account. The nickname can be the actual name of the account, a Gmail calendar title, or a generic nickname.
In the OAuth window, enter your Gmail account and password information.
On the card, authorize access to your Gmail account by clicking Allow.