Business account problem: with existing user account doesnt work

[Paul-Eraman-CoopCycle]

I made a business account and wanted to make an existing account an administrator. since the only option was to input the email of that existing account, i did that.

then i didnt recieve an email, and after exiting and entering my account, i did not have access to the business account.

naofood instance
user is pauljiano@protonmail.com
business account is businessbob2

[lucasferraro]

Changes introduced in this PR #4245

Existing user clicks on invitation but is not logged in in the app
Now we ask for login first, and then we skip the step 1 (personal account creation) and send the user to the 2nd step when should complete the info of the company.

loggedin_user.mp4

**Existing user opens the invitation while is already logged in in the app **
After click in the invitation we skip the step 1 (personal account creation) and send the user to the 2nd step when should complete the info of the company.

already_loggedin_user.mp4

Resend invitation email
New resend invitation email action for cases when the invitation email is not received

resend_email.mp4