Improve type hints in azure devops config flow (#75909)

* Improve type hints in azure devops config flow

* Improve

homeassistant/components/azure_devops/config_flow.py

@@ -1,4 +1,6 @@
 """Config flow to configure the Azure DevOps integration."""
+from __future__ import annotations
+
 from collections.abc import Mapping
 from typing import Any
 
@@ -19,11 +21,13 @@ class AzureDevOpsFlowHandler(ConfigFlow, domain=DOMAIN):
 
     def __init__(self):
         """Initialize config flow."""
-        self._organization = None
-        self._project = None
-        self._pat = None
+        self._organization: str | None = None
+        self._project: str | None = None
+        self._pat: str | None = None
 
-    async def _show_setup_form(self, errors=None):
+    async def _show_setup_form(
+        self, errors: dict[str, str] | None = None
+    ) -> FlowResult:
         """Show the setup form to the user."""
         return self.async_show_form(
             step_id="user",
@@ -37,7 +41,7 @@ class AzureDevOpsFlowHandler(ConfigFlow, domain=DOMAIN):
             errors=errors or {},
         )
 
-    async def _show_reauth_form(self, errors=None):
+    async def _show_reauth_form(self, errors: dict[str, str]) -> FlowResult:
         """Show the reauth form to the user."""
         return self.async_show_form(
             step_id="reauth",
@@ -48,9 +52,9 @@ class AzureDevOpsFlowHandler(ConfigFlow, domain=DOMAIN):
             errors=errors or {},
         )
 
-    async def _check_setup(self):
+    async def _check_setup(self) -> dict[str, str] | None:
         """Check the setup of the flow."""
-        errors = {}
+        errors: dict[str, str] = {}
 
         client = DevOpsClient()
 
@@ -69,10 +73,12 @@ class AzureDevOpsFlowHandler(ConfigFlow, domain=DOMAIN):
             return errors
         return None
 
-    async def async_step_user(self, user_input=None):
+    async def async_step_user(
+        self, user_input: dict[str, str] | None = None
+    ) -> FlowResult:
         """Handle a flow initiated by the user."""
         if user_input is None:
-            return await self._show_setup_form(user_input)
+            return await self._show_setup_form()
 
         self._organization = user_input[CONF_ORG]
         self._project = user_input[CONF_PROJECT]
@@ -115,7 +121,7 @@ class AzureDevOpsFlowHandler(ConfigFlow, domain=DOMAIN):
         )
         return self.async_abort(reason="reauth_successful")
 
-    def _async_create_entry(self):
+    def _async_create_entry(self) -> FlowResult:
         """Handle create entry."""
         return self.async_create_entry(
             title=f"{self._organization}/{self._project}",