This is my debug message:
$ ssh -p 29418 myusername@gerrit.wikimedia.org -v
OpenSSH_7.3p1, OpenSSL 1.0.2j 26 Sep 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to gerrit.wikimedia.org [208.80.154.85] port 29418.
debug1: Connection established.
debug1: identity file /c/Users/Gideon/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /c/Users/Gideon/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /c/Users/Gideon/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /c/Users/Gideon/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /c/Users/Gideon/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /c/Users/Gideon/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /c/Users/Gideon/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /c/Users/Gideon/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.3
debug1: Remote protocol version 2.0, remote software version GerritCodeReview_2.13.4-13-gc0c5cc4742 (SSHD-CORE-1.2.0)
debug1: no match: GerritCodeReview_2.13.4-13-gc0c5cc4742 (SSHD-CORE-1.2.0)
debug1: Authenticating to gerrit.wikimedia.org:29418 as 'Goldengide1'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: ecdh-sha2-nistp256
debug1: kex: host key algorithm: ssh-rsa
debug1: kex: server->client cipher: aes128-ctr MAC: hmac-sha2-256 compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: hmac-sha2-256 compression: none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ssh-rsa SHA256:j7HQoQ6fIuEgDHjONjI2CZ+2Iwxqgo2Ur5LbPqBgxOU
debug1: Host '[gerrit.wikimedia.org]:29418' is known and matches the RSA host key.
debug1: Found key in /c/Users/Gideon/.ssh/known_hosts:1
debug1: rekey after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: rekey after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: c:/wamp/www/mediawiki/.ssh/id_rsa
debug1: Authentications that can continue: publickey
debug1: Offering RSA public key: /c/Users/Gideon/.ssh/id_rsa
debug1: Authentications that can continue: publickey
debug1: Trying private key: /c/Users/Gideon/.ssh/id_dsa
debug1: Trying private key: /c/Users/Gideon/.ssh/id_ecdsa
debug1: Trying private key: /c/Users/Gideon/.ssh/id_ed25519
debug1: No more authentication methods to try.
Permission denied (publickey).