loopback model count

filter[where][price][between][0]=0&filter[where][price][between][1]=7
...
Shirts.find({where: {size: {between: [0,7]}}}, function (err, posts) { ... } ) await server.models.Role.findOrCreate(
 	{where: {name: val} },
 	{name: val}
 );PersistedModel.count([where], callback)