+ * @param[in] tmpSubject UUID of target device
+ * @param[in] credType Type of credential to be added
+ * @param[in] pin numeric characters
+ * @param[in] pinSize length of 'pin'
+ * @param[in] ownersLen Number of owners
+ * @param[in] owners Array of owners
+ * @param[out] tmpCredSubject Generated credential's subject.
+ *
+ * @return OC_STACK_OK for success and errorcode otherwise.