There was a great link someone commented on the post itself, describing how to implement a &quot;login via email link&quot; on mobile.
<a href="https:&#x2F;&#x2F;auth0.com&#x2F;blog&#x2F;2015&#x2F;12&#x2F;04&#x2F;how-to-implement-slack-like-login-on-ios-with-auth0&#x2F;" rel="nofollow">https:&#x2F;&#x2F;auth0.com&#x2F;blog&#x2F;2015&#x2F;12&#x2F;04&#x2F;how-to-implement-slack-lik...</a><p>I haven&#x27;t spent much time reading it, but I guess it works with deep-linking - the mechanism used when you click on a link to Facebook.com and it takes you to the Facebook app instead of the Facebook webpage.
<a href="https:&#x2F;&#x2F;developer.apple.com&#x2F;library&#x2F;ios&#x2F;documentation&#x2F;General&#x2F;Conceptual&#x2F;AppSearch&#x2F;UniversalLinks.html" rel="nofollow">https:&#x2F;&#x2F;developer.apple.com&#x2F;library&#x2F;ios&#x2F;documentation&#x2F;Genera...</a>