InvalidOperationException: No connection string named 'PayMyRentEntities' could be found in the application config file

Working on Migrating .NET Framework to .NET core 6. I am trying to run the application which is not able to read the connection string from appsettings.json file. I have shown the appsettings.json file as well. Please let me know what I need to do. Old application reads from web.config file.

Context File

  public partial class PayMyRentEntities : DbContext  

{

public PayMyRentEntities()  
    : base("name=PayMyRentEntities")  
{  
}  

protected override void OnModelCreating(DbModelBuilder modelBuilder)  
{  
    throw new UnintentionalCodeFirstException();  
}  

public virtual DbSet<Category> Categories { get; set; }  
public virtual DbSet<Hospital> Hospitals { get; set; }  
public virtual DbSet<LookupType> LookupTypes { get; set; }  
public virtual DbSet<LookupValue> LookupValues { get; set; }  

}
Appsetting.json

{

"WebApiPublishUrl": "http://localhost:61330/",
"ConnectionStrings": {
"PayMyRentEntities": "metadata=res:///PMR.csdl|res:///PMR.ssdl|res://*/PMR.msl;provider=System.Data.SqlClient;provider connection string=\u0022data source=ACDSK3;initial catalog=Phnix;user id=hyd3;password=hyd3;integrated security=false;MultipleActiveResultSets=True;App=EntityFramework\u0022"

}
}

Runtime Error

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