# Authentication method

**URL:** <https://community.auth0.com/t/authentication-method/124046>\
**Category:** Get Help\
**Tags:** signup-prompt-new-experience, login-experience\
**Created:** [January 3, 2024, 11:40am UTC](https://community.auth0.com/t/authentication-method/124046 "2024-01-03T11:40:10Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Anup](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/anup/32/48972_2.png) [@Anup](https://community.auth0.com/u/Anup)\
**Post date:** [January 3, 2024, 11:40am UTC](https://community.auth0.com/t/authentication-method/124046/1 "2024-01-03T11:40:10Z")

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As per this link we need to set the authentication method to ‘None’ to resolve teh ‘unauthorized’ issue. [Token Endpoint Authentication Method Post vs None](https://community.auth0.com/t/token-endpoint-authentication-method-post-vs-none/77488)

What’s the purpose of authentication method and what is the downside to setting the value to None.

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**Author:** ![ty.frith](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/ty.frith/32/58484_2.png) [@ty.frith](https://community.auth0.com/u/ty.frith)\
**Post date:** [January 3, 2024, 11:37pm UTC](https://community.auth0.com/t/authentication-method/124046/3 "2024-01-03T23:37:15Z")

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Hey there @Anup!

I’ll echo the question with regards to what is your use case and what type of application (SPA, web, etc.) are you using?

> [@Anup](#):
>
> What’s the purpose of authentication method and what is the downside to setting the value to None.

The token endpoint authentication method determines how a client authenticates with the token endpoint - The ‘none’ method is essential for applications where storing credentials isn’t feasible ([public clients](https://auth0.com/docs/get-started/applications/confidential-and-public-applications)). Other security mechanisms like PKCE and strict redirect URI validation are used to ensure the security of the OAuth flow.

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**Author:** ![system](https://global.discourse-cdn.com/auth0/original/3X/b/5/b560f266932fcce5d57f09a6595bd50518cae3f3.jpeg) [@system](https://community.auth0.com/u/system)\
**Post date:** [January 17, 2024, 11:37pm UTC](https://community.auth0.com/t/authentication-method/124046/4 "2024-01-17T23:37:45Z")

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