[BEST PRACTICE] To use with unique identifier

Hello, guys. Thanks for this project be public.
I have a question about best case to uses with mssql.uniqueidentifier.
This is a small example of my struct and crud operations. I use bun to connect to database

type SomeStruct struct {
	ID         int                    `bun:"id"`
	ExternalId mssql.UniqueIdentifier `bun:"externalid"`
	IdPost     int                    `bun:"id_post"`
	IdAvatar   int                    `bun:"id_avatar"`
}

func (someStruct *SomeStruct) MarshalJSON() ([]byte, error) {
	type Alias SomeStruct
	return json.Marshal(&struct {
		ID string `json:"id"`
		*Alias
	}{
		ID:    someStruct.ExternalId.String(),
		Alias: (*Alias)(someStruct),
	})
}

I need use externalId as string everywhere at my project. And i need to cast mssql uniqueidentifier to string like i do at MarshalJson func. Is there a best practice to handle this without uses conversion everytime? I am thinking about change the unique identifier column to string. But i will lost much funcionalities of unique identifier be managed by sql server.

No repository file, test, or entry point is named; start by reviewing the Go struct, MarshalJSON method, and mssql.UniqueIdentifier usage shown in the issue. A useful outcome would require an agreed approach for exposing the identifier as a string while retaining the SQL Server uniqueidentifier column, with documentation or tests demonstrating it.