Alma supports login using social network details. See Social Login for more details.
Following are instructions for defining a Twitter app to allow login to Alma using Twitter as mentioned here.
Connect to https://apps.twitter.com with the library's Twitter account.
Press on "Create New App".
Give it a name and a description. For website you can use you own institution website URL.
For Callback URL add your Alma URL, e.g. https://alma.exlibrisgroup.com
In the Keys and Access tokens change the Access Level from Read and write to Read-only.
From there you can also grab the Consumer Key and Consumer Secret.
The Consumer Key and Consumer Secret should be defined in Alma in the "Social Login" integration profile. See Alma OLH for more details.