{"errors":"[API] Invalid API key or access token (unrecognized login or wrong password)"

Retired Boards Appdev Authentication
18

is the url https://_YOUR_SHOP_NAME.myshopify.com/admin/apps/private/ still valid. When adding in my info with this URL I get a 404 page. I have created an app I have the API keys but not 100% sure of the password. I only have access to a secret key.