Validate the count query param with the max items configured.

components/org.wso2.carbon.identity.scim2.provider/src/main/java/org/wso2/carbon/identity/scim2/provider/resources/UserResource.java

@@ -197,6 +197,11 @@ public Response getUser(@HeaderParam(SCIMProviderConstants.ACCEPT_HEADER) String
                 throw  new FormatNotSupportedException(error);
             }
 
+            // Validates the count parameter if exists.
+            if (count != null && IdentityUtil.isSCIM2UserEndpointPaginationEnabled()) {
+                count = validateCountParameter(count);
+            }
+
             // obtain the user store manager
             UserManager userManager = IdentitySCIMManager.getInstance().getUserManager();
 
@@ -392,4 +397,25 @@ private void removeAskPasswordConfirmationCodeThreadLocal() {
         IdentityUtil.threadLocalProperties.get()
                 .remove(IdentityRecoveryConstants.AP_CONFIRMATION_CODE_THREAD_LOCAL_PROPERTY);
     }
+
+    /**
+     * Validate the count query parameter.
+     *
+     * @param count Requested item count.
+     * @return Validated count parameter.
+     * @throws CharonException If the count is negative.
+     */
+    private int validateCountParameter(Integer count) throws CharonException {
+
+        int maximumItemsPerPage = IdentityUtil.getMaximumItemPerPage();
+        if (count > maximumItemsPerPage) {
+            if (LOG.isDebugEnabled()) {
+                LOG.debug(String.format("Given limit exceeds the maximum limit. Therefore the limit is set to %s.",
+                        maximumItemsPerPage));
+            }
+            return maximumItemsPerPage;
+        }
+
+        return count;
+    }
 }