custom pivotKey for BelongsToMany and MorphToMany

[getriebesand]

Describe the feature

in VuexORM there was a method as() to customise the pivotKey. my_relation: this.belongsToMany(...).as('my_pivot')

The 2 Relation Classes have a property "pivotKey", but I can't find a use for it.

Additional information

• [X] Would you be willing to help implement this feature?

Final checks

• [X] Check existing discussions and issues.