Function create_token 

pub fn create_token(
    subject: String,
    resource: String,
    operation: String,
    key: KeyPair,
) -> Result<String, Box<dyn Error>>

Creates a biscuit token with default time configuration.

This function creates a base64-encoded token string that grants the specified operation on the resource for the given subject. The token will be valid for 5 minutes by default.

Arguments

• subject - The subject (user) identifier
• resource - The resource identifier to grant access to
• operation - The operation to grant access to
• key - The key pair used to sign the token

Returns

• Ok(String) - The base64-encoded token if successful
• Err(Box<dyn Error>) - If token creation fails