EntityFramework Migration for ASP.Net Core Identity creates Key without key length

Using ASP.Net Core Identity and EntityFramework, the migration code generated created key (for tables like ApplicationUser, from IdentityUser) with Id and no key length.

Getting an error when running with MySql:

> MySqlConnector.MySqlException (0x80004005): BLOB/TEXT column 'Id' used
> in key specification without a key length

For example:

modelBuilder.Entity("MyProject.ApplicationUser", b =>
{
b.Property("Id")
.HasColumnType("TEXT");