How can I pass a variable to the SqlAzureDacpacDeployment@1 task in azure devops pipeline

Question

I am trying to give an application access to a database. One of the steps require that a script that create a user must be run on the database. I am doing this through the pipeline with azureSqlAzureDacpacDeployment@1 task.

Secure Azure SQL Database connection from App Service using a managed identity

- task: SqlAzureDacpacDeployment@1
      inputs:
        azureSubscription: 'xxxxxxxx (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)'
        AuthenticationType: 'aadAuthenticationIntegrated'
        ServerName: '$(SqlServerName)'
        DatabaseName: '$(SqlDatabaseName)'
        deployType: 'InlineSqlTask'
        SqlInline: |
          CREATE USER [$(AppName)] FROM EXTERNAL PROVIDER;
          ALTER ROLE db_datareader ADD MEMBER [$(AppName)];
          ALTER ROLE db_datawriter ADD MEMBER [$(AppName)];
          GO
        InlineAdditionalArguments: '-v $(ApiAppName)'
        IpDetectionMethod: 'AutoDetect'

ApiAppName = 'AppName=MyApplication'

##[error]The format used to define the new variable for Invoke-Sqlcmd cmdlet is invalid. 
Please use the 'var=value' format for defining a new variable.Check out how to troubleshoot 
failures at https://aka.ms/sqlazuredeployreadme#troubleshooting-

Answer 1

It seems you are trying to define variables in SQL Script. You may try DECLARE statement and SET statement as the following link states:

https://docs.microsoft.com/en-us/sql/t-sql/language-elements/variables-transact-sql?view=sql-server-ver15

-- Declare two variables.
DECLARE @AppName nvarchar(50);

-- Set their values.
SET @AppName = 'MyApplication';