One Application Multiple Connections

[tyf]

Hey there @igelu! Welcome to the community @danalloway

It sounds like you might be interested in exploring Identifier First Authentication:

Configure Identifier First Authentication

At a base level, Ul/Auth0 needs to know which database a user is to authenticate against - Another option is to specify the particular connection param in the call to /authorize as outlined in the following FAQ:

Authenticating users through a specific Connection (database, social, etc.)

Problem statement: How do I authenticate users through a specific Connection? Solution: You can accomplish this by specifying a connection parameter in the authorize request of your authentication flow - It’s important to note that the parameter must be the name of the connection (i.e. google-oauth2, Username-Password-Authentication, etc.) as opposed to the identifier or ID. The configuration of this will depend on whether you are simply constructing the authorize request yourself, or using an …

This does have the drawback that you can only specify 1 connection, and must implemented in a way (multiple login buttons?) that allows you to make the appropriate call to /authorize.

Hope this helps at least get the wheels turning!