Creats new sub when given valid params (Customer_id, Tea_id, Frequency) Returns: Sub_id, type, attributes [ :title, :price, status, frequency, customer_id, tea_id]
Creats new sub when given valid params (Customer_id, Tea_id, Frequency)
Returns: Sub_id, type, attributes [ :title, :price, status, frequency, customer_id, tea_id]