Get the required values for authenticating an application to access Azure SQL Database from code

# sign in to Azure
Connect-AzAccount -Environment AzureChinaCloud

# for multiple subscriptions, uncomment and set to the subscription you want to work with
#$subscriptionId = "{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}"
#Set-AzContext -SubscriptionId $subscriptionId

$appName = "{app-name}" # display name for your app, must be unique in your directory
$uri = "http://{app-name}" # does not need to be a real uri
$secret = "{app-password}"

# create an AAD app
$azureAdApplication = New-AzADApplication -DisplayName $appName -HomePage $Uri -IdentifierUris $Uri -Password $secret

# create a Service Principal for the app
$svcprincipal = New-AzADServicePrincipal -ApplicationId $azureAdApplication.ApplicationId

Start-Sleep -s 15 # to avoid a PrincipalNotFound error, pause here for 15 seconds

# if you still get a PrincipalNotFound error, then rerun the following until successful.
$roleassignment = New-AzRoleAssignment -RoleDefinitionName Contributor -ServicePrincipalName $azureAdApplication.ApplicationId.Guid

# output the values we need for our C# application to successfully authenticate
Write-Output "Copy these values into the C# sample app"

Write-Output "_subscriptionId:" (Get-AzContext).Subscription.SubscriptionId
Write-Output "_tenantId:" (Get-AzContext).Tenant.TenantId
Write-Output "_applicationId:" $azureAdApplication.ApplicationId.Guid
Write-Output "_applicationSecret:" $secret

# sign in to Azure
az login

# for multiple subscriptions, uncomment and set to the subscription you want to work with
#$subscriptionId = "{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}"
#az account set --subscription $subscriptionId

$appName = "{app-name}" # display name for your app, must be unique in your directory
$uri = "http://{app-name}" # does not need to be a real uri
$secret = "{app-password}"

# create an AAD app
$azureAdApplication = az ad app create --display-name $appName --homepage $Uri --identifier-uris $Uri --password $secret

# create a Service Principal for the app
$svcprincipal = az ad sp create --id $azureAdApplication.ApplicationId

Start-Sleep -s 15 # to avoid a PrincipalNotFound error, pause for 15 seconds

# if you still get a PrincipalNotFound error, then rerun the following until successful.
$roleassignment = az role assignment create --role "Contributor" --scope /subscriptions/{Subscription-id}/resourceGroups/{resource-group-name} --assignee $azureAdApplication.ApplicationId.Guid

# output the values we need for our C# application to successfully authenticate
Write-Output "Copy these values into the C# sample app"

Write-Output "_subscriptionId:" (az account show --query "id")
Write-Output "_tenantId:" (az account show --query "tenantId")
Write-Output "_applicationId:" $azureAdApplication.ApplicationId.Guid
Write-Output "_applicationSecret:" $secret