ansible playbook方式使用yml文件方式配置ansible通信port以及user

admin

Basically username has the hostname as a variable.
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9 n4 C! M) ~1 ]7 p+ iNow our inventory has just IPs with group web.
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7 i( W& |% |4 b4 o' t, G> cat inventory.txt
[host]
4 |- d7 C4 W7 J( g2 A$ H172.16.2.8
172.16.x.y
172.16.y.z
" S" v7 W* S, R7 a/ C( jMy playbook yml has ansible user as following.
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& \1 _- t# _1 X; E4 I> cat uptime.yml
$ g& U% F- q3 N' z, V, S- hosts: host
  vars:
    ansible_ssh_port: xxxx
    ansible_user: bob~1234~{{inventory_hostname}}
  tasks:
  - name: Run uptime command
    shell: uptime
However, when I use following ansible-playbook command, it gives error for incorrect username.

! g! ^7 a% @+ y0 C( d1 a> ansible-playbook -v uptime.yml -i inventory.txt --private-key=key.pem
( l3 @. N' u) @& u) _4 q$ jPlease help me find correct ansible_user in playbook which has hostname as a variable inside.
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$ Z3 z) {  }/ V# [1 I