An open source solution pre-built ... saves you a lot of time and pain.
I haven't looked at the linked solutions specifically, but I've only rarely found this to be the case for generic protocols like this (especially anything around OAuth or OpenID). The open source solutions I've tried and given up on using always pull in hundreds of dependencies that have their own idiosyncracies as well as make a lot of undocumented assumptions and not be very well documented. Not to mention I still have to write code to use the "pre-built" solutions - usually more code than I would have had to write to just code the thing myself from scratch. They may be "better" from some perspective, but when I was working with OAuth, I tried (and tried and tried and tried) to use a pre-built solution for weeks until I finally gave up and just wrote my own in less than a day. Definitely longer and more painful to try to adopt somebody else's solution.
Comments
I haven't looked at the linked solutions specifically, but I've only rarely found this to be the case for generic protocols like this (especially anything around OAuth or OpenID). The open source solutions I've tried and given up on using always pull in hundreds of dependencies that have their own idiosyncracies as well as make a lot of undocumented assumptions and not be very well documented. Not to mention I still have to write code to use the "pre-built" solutions - usually more code than I would have had to write to just code the thing myself from scratch. They may be "better" from some perspective, but when I was working with OAuth, I tried (and tried and tried and tried) to use a pre-built solution for weeks until I finally gave up and just wrote my own in less than a day. Definitely longer and more painful to try to adopt somebody else's solution.