Add vyos_user implementation module (#25677)

* Add vyos_user implementation module

Signed-off-by: Trishna Guha <trishnaguha17@gmail.com>

* Integration test for vyos_user

Signed-off-by: Trishna Guha <trishnaguha17@gmail.com>

* Make state absent work

Signed-off-by: Trishna Guha <trishnaguha17@gmail.com>

* Unit test for vyos_user

Signed-off-by: Trishna Guha <trishnaguha17@gmail.com>

* Standardize user names

Signed-off-by: Trishna Guha <trishnaguha17@gmail.com>

* Modify integration test with idempotent case

Signed-off-by: Trishna Guha <trishnaguha17@gmail.com>

* Add role as alias to level

Signed-off-by: Trishna Guha <trishnaguha17@gmail.com>

test/integration/targets/vyos_user/tests/cli/basic.yaml

@@ -0,0 +1,71 @@
+---
+- name: Create user (SetUp)
+  vyos_user:
+    name: ansibletest1
+    password: test
+    state: present
+    provider: "{{ cli }}"
+  register: result
+
+- assert:
+    that:
+      - 'result.changed == true'
+      - '"set system login user ansibletest1 authentication plaintext-password" in result.commands'
+
+- name: Collection of users (SetUp)
+  vyos_user:
+    users:
+      - name: ansibletest2
+      - name: ansibletest3
+    level: operator
+    state: present
+    provider: "{{ cli }}"
+  register: result
+
+- assert:
+    that:
+      - 'result.changed == true'
+      - 'result.commands == ["set system login user ansibletest2 level operator", "set system login user ansibletest3 level operator"]'
+
+- name: Add user again (Idempotent)
+  vyos_user:
+    name: ansibletest1
+    password: test
+    state: present
+    provider: "{{ cli }}"
+  register: result
+
+- assert:
+    that:
+      - 'result.changed == false'
+      - 'result.commands | length == 0'
+
+- name: Add collection of users (Idempotent)
+  vyos_user:
+    users:
+      - name: ansibletest2
+      - name: ansibletest3
+    level: operator
+    state: present
+    provider: "{{ cli }}"
+  register: result
+
+- assert:
+    that:
+      - 'result.changed == false'
+      - 'result.commands | length == 0'
+
+- name: tearDown
+  vyos_user:
+    users:
+      - name: ansibletest1
+      - name: ansibletest2
+      - name: ansibletest3
+    state: absent
+    provider: "{{ cli }}"
+  register: result
+
+- assert:
+    that:
+      - 'result.changed == true'
+      - 'result.commands == ["delete system login user ansibletest1", "delete system login user ansibletest2", "delete system login user ansibletest3"]'