Make select_account and login_hint mutual-exclusive when msalruntime is used

Author: rayluo

msal/wam.py

@@ -100,6 +100,12 @@ def _signin_interactively(
         # the actual redirect_uri will be a value hardcoded by the underlying WAM
     if prompt:
         if prompt == "select_account":
+            if login_hint:
+                # FWIW, AAD's browser interactive flow would honor select_account
+                # and ignore login_hint in such a case.
+                # But pymsalruntime 0.3.x would pop up a meaningless account picker
+                # and then force the account_hint user to re-input password. Not what we want.
+                raise ValueError("Using both select_account and login_hint is not supported")
             params.set_select_account_option(
                 pymsalruntime.SelectAccountOption.SHOWLOCALACCOUNTSCONTROL)
         else: