Is there a way to add a "Full Name" field to the Email/Password authentication on Firebase? (Using Swift)
You cannot add your own custom field to the Firebase Authentication social providers (Facebook, Google, etc) or email+password. You can of course store such information in your Firebase Database, keyed by the user's ID:
users uid_209103 fullName: "Frank van Puffelen"
Note that Firebase Authentication already has a
displayName property for each user, which may cover your needs.