As a temporary workaround for not being able to send push messages from within a Flutter app, you can add a web service block that allows app users with a certain role to send push messages. We'll show you how to set this up for "Boss" type users in this simple and basic tutorial. 

Prerequisites: 

- Pro subscription

- It helps when you have some experience with using web services in AppMachine, but it is not a strict requirement. 

1. Start by adding a new web service block to your app:
   
   
   
2. Select the "Custom web service" option from the list after adding the block:
   
   
   
3. In the next screen, select the "POST" from the dropdown:
   
   
   
4. As URL enter the following URL: https://api.appmachine.com/v1/pushnotification
   
   
5. Select the "AppMachine API" option from the Authorization provider dropdown:
   
   
6. Add the following parameters in the Body tab:

   message
   isEnabledIOS: true
   isEnabledAndroid: true

   Like this: 
   Don't forget to set the "message" field to "required".
   
   

7. Click next, name your web service and then click next again: 
   
   

8. Name your block and you're done with adding the block: 
   
   

9. Remove the "IsEnabledIOS" and "IsEnabledAndroid" fields from your layout so your left with this: 
   

   
   
   

10. Change the button text if you want: 
    
    
    

11. Add a Lock block with the following lock type: 
    And the following settings:
    
    
    

12. Place the Push web service block nested below the Lock block: 
    
    
    

13. You're done! 

Notes: There is no way of displaying the amount of characters the user has left to type. There is a limit of 140, so you may want to add a label to inform the user about this. They'll have to keep an eye on the length of the message themselves.