updateMemberInfo

Updates a specific piece of a member or instance’s metadata.

int updateMemberInfo(char instanceID[256], char memberID[256],
                     char key[64], char value[256], void** params, 
                     void*** customReturn, char error[256])

Variable	Function	Description
`char instanceID[256]`	Input	The ID of the instance containing the member.
`char memberID[256]`	Input	The ID of the member whose metadata is being set. If set as all spaces, the metadata for the instance should be set.
`char key[64]`	Input	The key for the value to be set.
`char value[256]`	Input	The value to set.
`void** params`	Input	Pointer to an array of custom parameters (see Handling custom parameters and return values).
`void*** customReturn`	Output	Used to reference an array of custom return values (see Handling custom parameters and return values).
`char error[256]`	Output	If an error occurs, this should be filled with a description of the error.

updateMemberInfo attempts to update a member's metadata (specified by the given key) with the given value.