The term 'Add-Migration' is not recognized as the name of a cmdlet, function, script file

The term 'Add-Migration' 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.
ethod 'get_QueryProvider' in type 'Microsoft.EntityFrameworkCore.Storage.Internal.RelationalDatabaseFacadeDependencies' from assembly 'Microsoft.EntityFrameworkCore.Relational, Version=6.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' does not have an implementation.