How to create table definition using NUGET command?

Question

Hi Team

 

I have new table definition on my database, now i cant seem to access the context using this command on my NuGet.  NB: I have followed this link here, i am unable to achieve this well and need some help https://docs.microsoft.com/en-us/ef/core/miscellaneous/cli/powershell

Scaffold-DBContext "Data Source=GcobaniM-L\SQLEXPRESS;Database=eNtsaRegistration;Integrated Security=True" Microsoft.EntityFrameworkCore.SqlServer -OutputDir Models
Scaffold-DBContext : The term 'Scaffold-DBContext' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or
if a path was included, verify that the path is correct and try again.
At line:1 char:1
+ Scaffold-DBContext "Data Source=GcobaniM-L\SQLEXPRESS;Database=eNtsaR ...
+ ~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (Scaffold-DBContext:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException