Automatically map foreignKey ID with sequelize in Node.JS - node.js

Question

Is it possible that sequelize automatically finds foreignKey IDs?
Or is it necessary to find out existing IDs manually before a new insert.
e.g. if I have a user table with mapping from user-id to username.
From an API request I only know the users name but in all tables I need the ID.
const Users = dbConn.define('Users', {
id: {
field: 'usersId',
type: DataTypes.NUMBER,
primaryKey: true,
},
userName: {
field: 'usersName',
type: DataTypes.NUMBER,
allowNull: false,
},
});
const ChartSettings = dbConn.define('ChartSettings', {
id: {
field: 'CS_ID',
type: DataTypes.NUMBER,
primaryKey: true,
},
userId: {
field: 'UserId',
type: DataTypes.NUMBER,
allowNull: false,
},
clientType: {
field: 'ClientType',
type: DataTypes.STRING,
allowNull: false,
},
cS_Name: {
field: 'CS_Name',
type: DataTypes.STRING,
allowNull: false,
},
settings: {
field: 'Settings',
type: 'VARBINARY(MAX)',
allowNull: false,
},
}, {
timestamps: false
});
// 1:M mapping
User.hasMany(ChartSettings, { foreignKey: 'userId' });
ChartSettings.belongsTo(User, { foreignKey: 'id' });
// actually I do it like this
const userId = await getUserIdByName('admin'); // e.g. this results in 154
const row = ChartSettings.build({
userId: 154,
clientType: 'some text',
cS_Name: 'some text',
settings: 0,
});
row.save();
// ... but I would like to insert a new entry without having the users-ID
const row = ChartSettings.build({
// userId: ?
userName: 'admin', // will be automatically mapped. possible?
clientType: 'some other txt',
cS_Name: 'some other txt',
settings: 0,
});
row.save();