Changes to Create Purchase URL

the request property product_inline/client_metadata became nullable

the request property product_inline/client_read_only_metadata became nullable

the request property product_inline/server_metadata became nullable

request property customer_type was restricted to a list of enum values

request property product_inline/customer_type was restricted to a list of enum values

the product_inline/free_trial/items request property type changed from number to integer

added the new custom enum value to the request property customer_type

added the new custom enum value to the request property product_inline/customer_type

added the new team enum value to the request property customer_type

added the new team enum value to the request property product_inline/customer_type

added the new user enum value to the request property customer_type

added the new user enum value to the request property product_inline/customer_type