Cambios para que se envien los usernames con la cita

screens/main/Map.js

     mapflag = route.params.Flag, 
     i_token = route.params.I_Token,
     u_token =  route.params.U_Token,
+    username = route.params.Username,
+    I_username = route.params.I_Username,
     View_Only = route.params.View_Only
     } = route.params
     
           <Marker coordinate={pin1} />
         </MapView>
           <View style = {{position: 'absolute', bottom: '5%'}}>
-              <Button title= 'Confirm Location' onPress = {() => navigation.navigate('StateTime' , {Pin : pin1 , Appointment : Appointment, int_id : int_id, mapflag : mapflag, I_Token: i_token, U_Token: u_token})}/>
+              <Button title= 'Confirm Location' onPress = {() => navigation.navigate('StateTime' , {Pin : pin1 , Appointment : Appointment, int_id : int_id, 
+                mapflag : mapflag, I_Token: i_token, U_Token: u_token
+                ,Username: username, I_Username: I_username})}/>
           </View>
       </View>