I tried to write an automation api with revel framework but when I declare the variable S for new stackinlinestack, I get S as invalid type. Am i missing anything?

package controllers

import (

    

"context"

    

"<http://github.com/pulumi/pulumi-azure/sdk/go/azure/core|github.com/pulumi/pulumi-azure/sdk/go/azure/core>"

    

"<http://github.com/pulumi/pulumi/sdk/go/pulumi|github.com/pulumi/pulumi/sdk/go/pulumi>"

    

"<http://github.com/pulumi/pulumi/sdk/v2/go/x/auto|github.com/pulumi/pulumi/sdk/v2/go/x/auto>"

    

"<http://github.com/revel/revel|github.com/revel/revel>"

)

type ResourceNames struct {

    `RgName      string `json:"rgname"``     `StorageName string `json:"storage_name"``

}

type CreateReq struct {

    `StackName   string `json:"stackname"``     `ProjectName string `json:"project_name"``     

Resources   []ResourceNames

}

func (c App) CreateResourceGroup() revel.Result {

    

ctx := context.Background()

    

c.Params.BindJSON(&<http://c.cr|c.cr>)

    

program := createRgProgram(c.rn.RgName)

    

s, err := auto.NewStackInlineSource(ctx, <http://c.cr|c.cr>.StackName, <http://c.cr|c.cr>.ProjectName, program)

    

if err != nil {

        

if auto.IsSelectStack404Error(err) {

            

return c.RenderText("stack already exists")

        

}

        

return c.RenderText(err.Error())

    

}

    

s.SetConfig(ctx, "azure.clientId", auto.ConfigValue{Value: ""})

    

return c.Render()

}

func createRgProgram(Name string) pulumi.RunFunc {

    

return func(ctx *pulumi.Context) error {

        

// our program defines a s3 website.

        

// here we create the bucket

        

resourceGroup, err := core.NewResourceGroup(ctx, "testpulumi", &core.ResourceGroupArgs{

            

Location: pulumi.String("westindia"),

            

Name:     pulumi.String(Name),

            

Tags: pulumi.StringMap{

                

"Created_By": pulumi.String(""),

                

"Purpose":    pulumi.String("test pulumi"),

                

"Start_Date": pulumi.String("16-Nov-2020"),

                

"End_Date":   pulumi.String("16-Jan-2020"),

            

},

        

})

        

if err != nil {

            

return err

        

}

        

// export the website URL

        

ctx.Export("resourceGroupName", resourceGroup.Name)

        

return nil

    

}

}