Specify custom token provider when using the methods which uses token provider.

[chaiNeehujui]

Currently we can change the default token providers on TokenOptions in IdentityOptions. But in my case I need to specify custom token provider when using the method (assume that GenerateEmailConfirmationTokenAsync() and ConfirmEmailAsync()) because of the application which i made send a link if the user uses web client or send a code (Totp) if the user uses mobile client. In short, what do you think to specify token providers inline when generating and consuming the methods.

[HaoK]

We are adding the ability to specify instances in the provider map, I'm not sure if that completely addresses your issue, but you will be able to configure a different instance for each method if you so like via #983

If you want to switch between different providers in a different fashion you probably have to drop down and use the lower level methods:

Generate/VerifyUserTokenAsync(user, "YourCustomProvider", "ResetPassword"), those public apis are just sugar on top of that method with the IdentityOptions.Tokens.XyzProviderName hardcoded.

[HaoK]

If you are managing the token provider instances instead of the user manager, you can just directly call into the provider with the appropriate purpose/user, you don't need to go through the user manager in this case.