Looking for logging into the Shopify Api site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Shopify Api site. After that you can login as usual with your login credentials.
https://help.shopify.com/en/api/getting-started/authentication
https://ecommerce.shopify.com/c/shopify-apis-and-technology/t/customer-login-via-api-219146
https://ecommerce.shopify.com/c/shopify-apis-and-technology/t/which-is-the-customer-login-and-sign-up-api-375211
https://ecommerce.shopify.com/c/shopify-apis-and-technology/t/login-with-email-and-password-using-admin-api-509698
https://ecommerce.shopify.com/c/shopify-apis-and-technology/t/logging-in-customers-via-the-api-141721
https://developers.shopify.com/
https://github.com/Shopify/mobile-buy-sdk-ios/issues/395
https://auth0.com/docs/connections/social/shopify
https://www.shopping-cart-migration.com/faq/22-shopify/40-where-can-i-get-shopify-api-key-and-api-password
https://stackoverflow.com/questions/29027764/shopify-orders-api-redirects-me-to-login-when-specifying-id
http://gavinballard.com/shopify-oauth-flow-for-dummies/
https://www.programmableweb.com/api/shopify-admin
https://medium.com/@growthspark/understanding-shopify-plus-from-a-developers-perspective-5dcfe1f521d4