---
id: client-libraries
title: Client Libraries
description: 'Supabase provides client libraries in several languages.'
---
import Tabs from '@theme/Tabs';
import TabItem from '@theme/TabItem';
The [Supabase Client](/docs/client/supabase-client) makes it simple for developers to build secure and scalable products.
## Auth
Create new users using [`signUp()`](/docs/client/auth-signup).
```js
const { error, data } = await supabase.auth.signUp({
email: 'example@email.com',
password: 'example-password',
})
```
```py
# Not yet implemented
```
Existing users can log in using [`signIn()`](/docs/client/auth-signin).
```js
const { error, data } = await supabase.auth.signIn({
email: 'example@email.com',
password: 'example-password',
})
```
```py
# Not yet implemented
```
If there is an email, but no password passed to [`signIn()`](/docs/client/auth-signin), the user will receive a magic link.
```js
const { error, data } = await supabase.auth.signIn({
email: 'example@email.com'
})
```
```py
# Not yet implemented
```
Third party logins are also handled through [`signIn()`](/docs/client/auth-signin).
```js
const { user, error } = await supabase.auth.signIn({
// provider can be 'github', 'google', 'gitlab', or 'bitbucket'
provider: 'github'
})
```
```py
# Not yet implemented
```
## Managing data
Since Postgres is a Relational database, the client makes it simple to query tables and fetch related data in one round-trip, using [`select()`](/docs/client/select).
```js
const { data, error } = await supabase
.from('countries')
.select(`
name,
cities (
name
)
`)
```
```py
# Not yet implemented
```
You can do advanced [filtering](/docs/client/using-filters) to extract only the data that you need.
```js
const { data, error } = await supabase
.from('cities')
.select('name, country_id')
.lt('country_id', 100)
.limit(10)
```
```py
# Not yet implemented
```
You can create data easily using [`insert()`](/docs/client/insert).
```js
const { data, error } = await supabase
.from('cities')
.insert([
{ name: 'The Shire', country_id: 554 },
{ name: 'Rohan', country_id: 555 },
])
```
```py
# Not yet implemented
```
## Realtime Changes
The Supabase client makes it simple to listen to realtime database changes, using [`subscribe()`](/docs/client/subscribe).
```js
const mySubscription = supabase
.from('countries')
.on('*', payload => {
console.log('Change received!', payload)
})
.subscribe()
```
```py
# Not yet implemented
```
You can even [listen to Row Level changes](/docs/client/subscribe#listening-to-row-level-changes).
```js
const mySubscription = supabase
.from('countries:id.eq.200')
.on('UPDATE', handleRecordUpdated)
.subscribe()
```
```py
# Not yet implemented
```
## Next steps
- View the [Client Docs](/docs/client/supabase-client)
- Sign in: [app.supabase.io](https://app.supabase.io)