Sequel ProからRDS(MySQL)に接続

私は、今AWSを使って、ウェブサイトを作っています。ウェブサイト自体は、順調に動いているのですが、データベースに接続がまだできていない状態になっています。もしわかる方がいらしたら、教えて頂きたいです。

AWSの接続に参考にしたサイト
https://qiita.com/iwaseasahi/items/7af16215f06fbc57c490

   名前　： AWS RDS

MYSQL ホスト：　RDSのエンドポイント
ユーザー名：　　　database.ymlの参照
パスワード：　　　database.ymlの参照
データベース： database.ymlの参照
ポート：　　　　　3306

SSHホスト： EC2のIP
SSHユーザー：ユーザー名
SSHパスワード： EC2 Key Pairの秘密鍵
SSHポート：　　　22

エラー内容

OpenSSH_7.9p1, LibreSSL 2.7.3
debug1: Reading configuration data /Users/hiroshi/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 48: Applying options for *
debug1: Control socket " none" does not exist
debug1: Connecting to $$$$$ [$$$$$$$] port 22.
debug1: fd 3 clearing O_NONBLOCK
debug1: Connection established.
debug1: identity file /Users/hiroshi/.ssh/id_rsa type 0
debug1: identity file /Users/hiroshi/.ssh/id_rsa-cert type -1
debug1: identity file /Users/hiroshi/.ssh/id_dsa type -1
debug1: identity file /Users/hiroshi/.ssh/id_dsa-cert type -1
debug1: identity file /Users/hiroshi/.ssh/id_ecdsa type -1
debug1: identity file /Users/hiroshi/.ssh/id_ecdsa-cert type -1
debug1: identity file /Users/hiroshi/.ssh/id_ed25519 type -1
debug1: identity file /Users/hiroshi/.ssh/id_ed25519-cert type -1
debug1: identity file /Users/hiroshi/.ssh/id_xmss type -1
debug1: identity file /Users/hiroshi/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.9
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4
debug1: match: OpenSSH_7.4 pat OpenSSH_7.0*,OpenSSH_7.1*,OpenSSH_7.2*,OpenSSH_7.3*,OpenSSH_7.4*,OpenSSH_7.5*,OpenSSH_7.6*,OpenSSH_7.7* compat 0x04000002
debug1: Authenticating to $$$$$$$$$$$ as '$$$$$$$$'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha$$$$$
debug1: kex: host key algorithm: ecdsa-sha2-$$$$$$
debug1: kex: server->client cipher: $$$$$$$$$$$$$$$$$$$
 MAC: <implicit> compression: none
debug1: kex: client->server cipher: $$$$$$$$$$$$$$$$ 
MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: $$$$$$$$$
$$$$$$$$$$$$$$$$/$$$$$$$$$$$$
debug1: Host '#############' is known and matches the ECDSA host key.
debug1: Found key in /Users/hiroshi/.ssh/known_hosts:2
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 134217728 blocks
debug1: Will attempt key: /Users/hiroshi/.ssh/id_rsa RSA SHA256:P8v8WluhU1l4OpUyzrydo0sjdt3FxMsk4RqNFPrUC7c
debug1: Will attempt key: /Users/hiroshi/.ssh/id_dsa
debug1: Will attempt key: /Users/hiroshi/.ssh/id_ecdsa
debug1: Will attempt key: /Users/hiroshi/.ssh/id_ed25519
debug1: Will attempt key: /Users/hiroshi/.ssh/id_xmss
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha$$$$$,rsa-sha$$$$$>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering public key: /Users/hiroshi/.ssh/id_rsa RSA 
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
debug1: Authentications that can continue: publickey
debug1: Trying private key: /Users/hiroshi/.ssh/id_dsa
debug1: Trying private key: /Users/hiroshi/.ssh/id_ecdsa
debug1: Trying private key: /Users/hiroshi/.ssh/id_ed25519
debug1: Trying private key: /Users/hiroshi/.ssh/id_xmss
debug1: No more authentication methods to try.
$$$$$$@$$$$$$$: Permission denied (publickey).