Function check_permission 

pub async fn check_permission(
    client: &Client,
    token: &str,
    guild_id: &str,
    user_id: &str,
    permission: &str,
) -> Result<bool, Box<dyn Error>>

Checks if a user has a specific permission in a Discord guild.

Arguments

• client - The HTTP client used to send the request.
• token - The bot token for authentication.
• guild_id - The ID of the guild.
• user_id - The ID of the user.
• permission - The permission to check for.

Returns

A result indicating whether the user has the specified permission.