Sequelize - Join two tables with multiple non-primary keys - join

Question

Using Sequelize, we normally connect two tables together such as the following:
Order.belongsTo(OrderType, {
foreignKey: {
name: 'typeId',
},
constraints: false
});
OrderType.hasMany(Order, {
foreignKey: {
name: 'typeId',
},
constraints: false
});
However, we we need to pull in info from the Contact table with two keys rather than one. We need to identify via the user + phone, not the Contact table record id. This is what we have so far, but it is not working:
Order.belongsTo(Contact, {
as: 'phoneInfo',
foreignKey: {
name: 'userId',
name: 'phone1',
},
constraints: false
});
Contact.hasMany(Order, {
foreignKey: {
name: 'userId',
name: 'phone1',
},
constraints: false
});
We have also tried adding "sourceKey" and "targetKey":
Order.belongsTo(Contact, {
as: 'phoneInfo',
foreignKey: ['userId','phone1'],
sourceKey: ['userId','phone'],
constraints: false
});
Contact.hasMany(Order, {
foreignKey: ['userId','phone1'],
targetKey: ['userId','phone'],
constraints: false
});
userId = a column in both Order & Contact tables
phone1 = a column in Order table, type string
phone = a column in Contact table, type string
The error we are getting is:
DatabaseError [SequelizeDatabaseError]: operator does not exist:
character varying = integer
I believe that this means that it is looking for the keys to be integers instead of strings. However, that is how they are in the database - strings, and need to remain so.
Is there no way to join two tables via two non-primary keys, and for those two keys to be non-integer (i.e. strings)? The best I've found is Sequelize - Join with multiple column, but there's got to be an easier way to do this in Sequelize.