Smol fix to make temp file usage clearer

Most likely this temp file solution does
not do what I though...

src/main.py

@@ -185,7 +185,7 @@ class PassUi(wx.Frame):
         # self.pass_handler.pass_init(self.gpg_key, git_repo)
         # self.add_buttons()
 
-    def git_submit_btn_clicked(self, widget_list) -> str:
+    def git_submit_btn_clicked(self, widget_list):
         default_ports = {'git': 9418, 'git+ssh': 22, 'https': 443}
         user: str = widget_list[1].GetLineText(0)
         password: str = widget_list[3].GetLineText(0)
@@ -194,15 +194,18 @@ class PassUi(wx.Frame):
         port: str = widget_list[9].GetLineText(0)
         path: str = widget_list[11].GetLineText(0)
         if not port:
-            port = default_ports[protocol]
+            port = str(default_ports[protocol])
         self.file_str = 'protocol={}\nhost={}:{}{}\nusername=\npassword={}\n'.format(protocol, host, port, path, user,
                                                                                      password)
         timeout_in_sec = 24 * 60 * 60
-        temp_tuple = tempfile.mkstemp(text=self.file_str)
-        run_command(['/usr/bin/git', 'credential-store', '--file', temp_tuple[1]])
+        file_descriptor, file_name = tempfile.mkstemp(text=True)
+        with open(file_name, 'w') as file:
+            file.write(self.file_str)
+        os.close(file_descriptor)
+        run_command(['/usr/bin/git', 'credential-store', '--file', file_name])
         run_command(
             ['/usr/bin/git', 'config', 'credential.helper', 'cache --timeout={}'.format(timeout_in_sec)])
-        os.unlink(temp_tuple[1])
+        os.unlink(file_name)
         self.init_button_clicked('{}://{}:{}{}'.format(protocol, host, port, path))
 
     def gpg_button_clicked(self):