Ability to generate Account token for SSO logged user

[seb-835]

Summary

it is impossible to generate an account token for a SSO authenticated user using argocd CLI or through the GUI.

$ argocd login argo.*** --sso --grpc-web
Opening browser for authentication
Performing authorization_code flow login: [....]
Authentication successful
'[email protected]' logged in successfully
Context 'argo.***' updated

$ argocd account generate-token --grpc-web 
FATA[0000] rpc error: code = NotFound desc = account '[email protected]' does not exist

Motivation

Be able to use token for SSO authenticated User like we can do with gitlab, harbor, .... in a way to automate tasks.

Proposal

Add the ability thorugh GUI or through the argocd cli.