Connect rails app to Microsoft dynamics 365 crm

ruby-on-rails api dynamics-crm
Please I haven't programmed a rails app that access Microsoft dynamics crm before. Please I need a guide on how to do the connections, store and retrieve data. Also can I use the crm as the main db for the app so users get authenticated or I should use a local db to authenticate and only send contacts and other data to the crm. Please can someone help me out.??

googling "ruby gem microsoft dynamics crm api" turns up several
libraries; have you tried any of them?