#[ink(message)]
        pub fn verify_identity_response(&mut self, signature: [u8; 65]) -> Result<bool> {
            // Ensure flow began
            // Todo: Extract accountId later, the person authorizer can't call as the user
            if !self
                .account_verification_flow_initiation
                .contains(&self.env().caller())
            {
                return Err(Error::VerificationFlowNotInitiated);
            }

            if !self.authorizers.contains(&self.env().caller()) {
                return Err(Error::NotAuthorized);
            }

            // Get ECDSA public key out of account
            let candidate_pub_key = self.env().caller().ecdsa_public_key(); // TODO: [Work in progress] - This is not working yet -

            // Verify using the caller's signature
            // https://substrate.dev/rustdocs/v2.0.0/sp_io/crypto/fn.secp256k1_ecdsa_recover.html
            let message_hash: [u8; 32] = [0; 32]; // TODO: [Please review] - Is this the right way to do this?

            let output: [u8; 33] = [0; 33]; // TODO: [Please review] - Is this the right way to do this?

            let recovered_key = ink::env::ecdsa_recover(
                &signature,
                &message_hash,
                &mut output
            );

            let index = self.project_index;

            // Check recovered key == candidate_pub_key
            if recovered_key == candidate_pub_key {
                // Remove flow initiation
                self.account_verification_flow_initiation.take(&self.env().caller());
                // Add to verified accounts
                self.verified_accounts.insert(index.try_into().unwrap(), self.env().caller());
                Ok(true)
            } else {
                Err(Error::VerificationFailed)
            }

❯ cargo check
    Checking chocolate v0.1.0 (/home/sha888/chocolate/chocolate-contract)
error[E0599]: no method named `ecdsa_public_key` found for struct `ink::ink_primitives::AccountId` in the current scope
   --> lib.rs:275:57
    |
275 |             let candidate_pub_key = self.env().caller().ecdsa_public_key();
    |                                                         ^^^^^^^^^^^^^^^^ method not found in `ink::ink_primitives::AccountId`

For more information about this error, try `rustc --explain E0599`.
error: could not compile `chocolate` due to previous error