SSO via ORCID does not work if the ORCID e-mail is private

[pronguen]

Bug description:

SSO via ORCID does not work if the ORCID e-mail is private.

Expected behavior:

After submitting the registration form

• if the e-mail matches a SONAR account: the user is logged in and receives a confirmation of the login
• if the e-mail does not match a SONAR account: the user is not logged in and receives a clear error message

Steps to Reproduce:

1. You have an ORCID account with a private e-mail AND you have a SONAR account with this same e-mail
2. On SONAR, you click on "Login with ORCID"
3. You actually login on ORCID and are redirected to SONAR
4. SONAR opens the registration form (https://sonar.test.rero.ch/oauth/signup/orcid/) because it didn't receive your ORCID e-mail to match the two accounts
5. You enter your e-mail
6. You are not logged in SONAR and don't receive any message

Context

Server:

• production: v1.7.0