Use LoginProvider to signin for ExternalLogin #14651
Description
Use LoginProvider to signin for ExternalLogin https://support.abp.io/QA/Questions/5244#answer-3a0c363b-9d39-0cad-ded7-08dcb3baee35
Checklist
- I fully tested it as developer / designer and created unit / integration tests
- I documented it (or no need to document or I will create a separate documentation issue)
- I worked with the design team to get their idea for UI/UX design (or no need to design for this PR)
- I've assigned reviewer, related labels and set a milestone for this PR