Creating a Terra Account
To register for a Terra account, you will need a Gmail account or another email account (an institutional email, for example) associated with a Google identity. See Obtaining a Google Id for instuctions on creating a Google ID.
See Set up a Terra account for instructions on setting up your Terra account.
Be sure to setup your Terra Account with the same email address that you will use for Gen3, and Dockstor and if required your Google Cloud Account.