git clone thru SSH not working on newly bitbucket cloud

[EK]

Hi Guys, 

I have sign up and created a repo on bitbucket cloud.

And I have a fresh install ubuntu 16.04 server and tried to add the private key to the bitbucket. But when I try to clone my repo it's prompting an error.

"Cloning into '.'...
Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists."

I tried this one for setup of SSH key but no luck.

https://confluence.atlassian.com/bitbucket/set-up-an-ssh-key-728138079.html

[EK]

Tried also this https://confluence.atlassian.com/bitbucket/troubleshoot-ssh-issues-271943403.html

ssh -v git@bitbucket.org
OpenSSH_7.2p2 Ubuntu-4ubuntu2.4, OpenSSL 1.0.2g 1 Mar 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to bitbucket.org [18.205.93.1] port 22.
debug1: Connection established.
debug1: identity file /home/apacheubuntu/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/apacheubuntu/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/apacheubuntu/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/apacheubuntu/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/apacheubuntu/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/apacheubuntu/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/apacheubuntu/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/apacheubuntu/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.4
debug1: Remote protocol version 2.0, remote software version conker_1.1.13-7af6557 app-132
debug1: no match: conker_1.1.13-7af6557 app-132
debug1: Authenticating to bitbucket.org:22 as 'git'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256@libssh.org
debug1: kex: host key algorithm: ssh-rsa
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ssh-rsa SHA256:zzXQOXSRBEiUtuE8AikJYKwbHaxvSc0ojez9YXaGp1A
debug1: Host 'bitbucket.org' is known and matches the RSA host key.
debug1: Found key in /home/apacheubuntu/.ssh/known_hosts:1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: rekey after 134217728 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: /home/apacheubuntu/.ssh/id_rsa
debug1: Server accepts key: pkalg ssh-rsa blen 279
debug1: Authentication succeeded (publickey).
Authenticated to bitbucket.org ([18.205.93.1]:22).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
debug1: pledge: network
debug1: Sending environment.
debug1: Sending env LANG = en_PH.UTF-8
PTY allocation request failed on channel 0
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
logged in as bull88.

You can use git or hg to connect to Bitbucket. Shell access is disabled.
debug1: channel 0: free: client-session, nchannels 1
Connection to bitbucket.org closed.
Transferred: sent 2936, received 1852 bytes, in 0.5 seconds
Bytes per second: sent 6301.6, received 3975.0
debug1: Exit status 0

[EK]

I'm using an Ubuntu Server.

When I tried using root it's working but when I'm using the local user account it's not working. local user is a sudoer i have added also the all permission on visudo.