Merge pull request #22420 from abpframework/Switching-users-during-OAuth-login

Add documentation for switching users during OAuth login with `prompt=select_account`

docs/en/modules/account-pro.md

@@ -104,6 +104,48 @@ If you use `Social / External Logins`, It is automatically called for authentica
 
 ![account-pro-module-local-login-setting](../images/account-pro-module-local-login-setting.png)
 
+### Switching users during OAuth login
+
+If you have an OAuth/Auth Server application using the Account Pro module, you can pass the `prompt=select_account` parameter to force the user to select an account.
+
+Example to pass `prompt=select_account` parameter in OpenIdConnect:
+
+```csharp
+.AddAbpOpenIdConnect("oidc", options =>
+{
+    // ...
+    options.Events = new OpenIdConnectEvents
+    {
+        OnRedirectToIdentityProvider = redirectContext =>
+        {
+            redirectContext.ProtocolMessage.Prompt = "select_account";
+            return Task.CompletedTask;
+        }
+    };
+    // ...
+});
+```
+
+![account-pro-secect-account](../images/account-pro-select-account-parameter.png)
+
+You have three options:
+
+- Continue: The login process will continue with the current account.
+- Switch to another account: Will be redirected to the login page to log in with another account.
+- Create a new account: Will be redirected to the register page to create a new account.
+
+> The OAuth login process will continue after the user selects one of the options.
+
+![account-pro-secect-account](../images/account-pro-select-account.png)
+
+All available prompt parameters:
+
+| **Parameter**    | **Description**                                                                                             |
+|------------------|-------------------------------------------------------------------------------------------------------------|
+| `login`          | Forces the user to re-authenticate, even if they are already logged in.                                      |
+| `consent`        | Forces the user to re-consent to the requested permissions, even if they have consented before.             |
+| `select_account` | Forces the user to select an account, even if they are already logged in (especially relevant if multiple accounts are available). |
+| `none`           | Does not trigger any prompt. If the user is not logged in, or their consent is not granted, it will return an error or redirect accordingly. |
 
 ## Social / External Logins