User Management

Create, update, and manage CometChat users programmatically using the iOS SDK. Includes user creation, profile updates, and the User class reference.

AI Integration Quick Reference

// Create a user
let user = User(uid: "user1", name: "Kevin")
CometChat.createUser(user: user, apiKey: "AUTH_KEY",
    onSuccess: { user in }, onError: { error in })

// Update a user
let updateUser = User(uid: "user1", name: "Kevin Fernandez")
CometChat.updateUser(user: updateUser, apiKey: "AUTH_KEY",
    onSuccess: { user in }, onError: { error in })

// Update logged-in user (no auth key needed)
CometChat.updateCurrentUserDetails(user: currentUser,
    onSuccess: { user in }, onError: { error in })

Note: User creation/deletion should ideally happen on your backend via the REST API.

Users must exist in CometChat before they can log in. This page covers creating, updating, and deleting users.

The typical flow:

1. User registers in your app → Create user in CometChat
2. User logs into your app → Log user into CometChat

User deletion is only available via the REST API — there is no client-side SDK method for it.

Creating a User

User creation should ideally happen on your backend via the REST API.

Security: Never expose your Auth Key in client-side production code. User creation and updates using Auth Key should ideally happen on your backend server. Use client-side creation only for prototyping or development.

For client-side creation (development only), use createUser():

Swift

let newUser : User = User(uid: "user1", name: "Kevin") // Replace with your uid and the name for the user to be created.
let authKey = "AUTH_KEY" // Replace with your Auth Key.
CometChat.createUser(user: newUser, apiKey: authKey, onSuccess: { (User) in
      print("User created successfully. \(User.stringValue())")
  }) { (error) in
     print("The error is \(String(describing: error?.description))")
}

UID can be alphanumeric with underscore and hyphen. Spaces, punctuation and other special characters are not allowed.

Updating a User

Like creation, user updates should ideally happen on your backend via the REST API.

For client-side updates (development only), use updateUser():

Swift

let updateUser : User = User(uid: "user1", name: "Kevin Fernandez") // Replace with your uid and the name for the user to be created.
let authKey = "AUTH_KEY" // Replace with your Auth Key.
CometChat.updateUser(user: newUser1, apiKey: authKey, onSuccess: { (User) in
     print("User updated successfully. \(User.stringValue())")
 }) { (error) in
     print("The error is \(String(describing: error?.description))")
 }

Ensure the User object has the correct UID set.

Updating Logged-in User

Use updateCurrentUserDetails() to update the current user without an Auth Key. Note: You cannot update the user’s role with this method.

Swift

let currentUser = User(uid: "cometchat-uid-1", name: "Andrew Joseph")
CometChat.updateCurrentUserDetails(user: currentUser, onSuccess: { user in
	print("Updated user object",user)
}, onError: { error in
	print("Update user failed with error: \(error?.errorDescription)")
})

The method updates the logged-in user irrespective of the UID passed.

Deleting a User

User deletion is only available via the REST API.

User Class

Field	Editable	Information
uid	specified on user creation. Not editable after that	Unique identifier of the user
name	Yes	Display name of the user
avatar	Yes	URL to profile picture of the user
link	Yes	URL to profile page
role	Yes	User role of the user for role-based access control
metadata	Yes	Additional information about the user as Dictionary
status	No	Status of the user. Could be either online/offline
statusMessage	Yes	Any custom status message that needs to be set for a user
lastActiveAt	No	The Unix timestamp of the time the user was last active.
hasBlockedMe	No	A boolean that determines if the user has blocked the logged in user
blockedByMe	No	A boolean that determines if the logged in user has blocked the user
tags	Yes	A list of tags to identify specific users

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Next Steps

Retrieve Users

Fetch and filter user lists with pagination.

User Presence

Monitor real-time online/offline status.

Block Users

Block and unblock users.

Authentication

Log users into CometChat.