Update login_vars.yml

Signed-off-by: sakshiarora13 <sakshi_arora1@dell.com>

control_plane/input_params/login_vars.yml

@@ -51,13 +51,14 @@ idrac_password: ""
 ### Usage: webui_grafana ###
 
 # The username for grafana UI
-# The length of username should be atleast 6
+# The length of username should be atleast 5
 # The username must not contain -,\, ',"
 grafana_username: ""
 
 # Password used for grafana UI
-# The length of the password should be at least 6
+# The length of the password should be at least 5
 # The password must not contain -,\, ',"
+# The password should not be kept 'admin'
 grafana_password: ""
 
 ### Usage: network_ethernet ###