# \#signin **URL:** https://community.auth0.com/tag/signin/649.md [Latest](https://community.auth0.com/latest.md) · [Categories](https://community.auth0.com/categories.md) · [Tags](https://community.auth0.com/tags.md) --- ## [Signing up with Github instead of Signing In, even if there is already a logged in user](https://community.auth0.com/t/signing-up-with-github-instead-of-signing-in-even-if-there-is-already-a-logged-in-user/69872)
**Author:** [@zev\_izenberg](https://community.auth0.com/u/zev_izenberg)\ **Replies:** 3\ **Last updated:** [September 30, 2021, 9:55am UTC](https://community.auth0.com/t/signing-up-with-github-instead-of-signing-in-even-if-there-is-already-a-logged-in-user/69872 "2021-09-30T09:55:37Z")
Hi! My application allows users to either Sign Up or Sign In with Github. However, if a user is already logged in via github, they are silently authenticated and bypass Github’s login screen. This is a problem, because … --- ## [Allow only a single single signon per client](https://community.auth0.com/t/allow-only-a-single-single-signon-per-client/9472)
**Author:** [@chj](https://community.auth0.com/u/chj)\ **Replies:** 1\ **Last updated:** [December 17, 2018, 3:29pm UTC](https://community.auth0.com/t/allow-only-a-single-single-signon-per-client/9472 "2018-12-17T15:29:06Z")
Hi I have a tenant with 2 clients. I want to limit my users to one active “session” per client inside that tenant. How can I achieve this? I was thinking of disabling all access tokens for a user on a single client whe… --- ## [Signing in user from API](https://community.auth0.com/t/signing-in-user-from-api/9349)
**Author:** [@m.pokora](https://community.auth0.com/u/m.pokora)\ **Replies:** 1\ **Last updated:** [January 31, 2018, 9:51pm UTC](https://community.auth0.com/t/signing-in-user-from-api/9349 "2018-01-31T21:51:07Z")
Hello, In project I’m using auth0-jspackage and performing user sign in via own form and calling .client.login({ ... }). Now I wanted to move this action to my backend in such way that user will send sign in credentials… --- ## [Proper way of pre-creating and pre-authorizing users for custom magic app links?](https://community.auth0.com/t/proper-way-of-pre-creating-and-pre-authorizing-users-for-custom-magic-app-links/9322)
**Author:** [@matejukmar](https://community.auth0.com/u/matejukmar)\ **Replies:** 1\ **Last updated:** [December 14, 2018, 6:24pm UTC](https://community.auth0.com/t/proper-way-of-pre-creating-and-pre-authorizing-users-for-custom-magic-app-links/9322 "2018-12-14T18:24:01Z")
We have a mobile app which uses Auth0 for user authorization. One of our clients came with an idea to have deep links sent to specific users by email - so we know basic information about each user link is sent to (name a… --- ## [How do a signIn with Auth0 npm package?](https://community.auth0.com/t/how-do-a-signin-with-auth0-npm-package/9132)
**Author:** [@peter.banjo](https://community.auth0.com/u/peter.banjo)\ **Replies:** 6\ **Last updated:** [January 9, 2018, 10:54pm UTC](https://community.auth0.com/t/how-do-a-signin-with-auth0-npm-package/9132 "2018-01-09T22:54:58Z")
We are looking to adopt Auth0 for a single sign-on for multiple apps but we have some existing users in our database. On the server-side we would like to attempt to login to our database with the user’s email and passwor… --- ## [Hosted Signin page auto signs in people without an account if selected gmail option](https://community.auth0.com/t/hosted-signin-page-auto-signs-in-people-without-an-account-if-selected-gmail-option/8915)
**Author:** [@coltoncosmos94](https://community.auth0.com/u/coltoncosmos94)\ **Replies:** 1\ **Last updated:** [December 20, 2017, 9:36pm UTC](https://community.auth0.com/t/hosted-signin-page-auto-signs-in-people-without-an-account-if-selected-gmail-option/8915 "2017-12-20T21:36:01Z")
I have a hosted signup page and users can’t sign up them selves we have to create their accounts for them. Email and password When anyone selects the login with gmail option it automatically signs them in and they can … --- ## [Phantom user blocks real user from signing in](https://community.auth0.com/t/phantom-user-blocks-real-user-from-signing-in/8060)
**Author:** [@Graphcool](https://community.auth0.com/u/Graphcool)\ **Replies:** 4\ **Last updated:** [September 3, 2017, 4:38am UTC](https://community.auth0.com/t/phantom-user-blocks-real-user-from-signing-in/8060 "2017-09-03T04:38:55Z")
I have a user who can no longer sign in to out website. When I search for his email in Auth0 I see 2 users. When I click on one of them, I’m told that the user does not exist. When the user tries to sign in he get this …