Set bot.draupnir as default username for the bot in config

roles/custom/matrix-bot-draupnir/defaults/main.yml

@@ -74,7 +74,7 @@ matrix_bot_draupnir_pantalaimon_password: ""
 
 # Username and password the bot uses for logging in directly. If using Pantalimon
 # these values become the values of `matrix_bot_draupnir_pantalaimon_username` and `matrix_bot_draupnir_pantalaimon_password`
-matrix_bot_draupnir_login: "{{ matrix_bot_draupnir_pantalaimon_username }}"
+matrix_bot_draupnir_login: "{{ matrix_bot_draupnir_pantalaimon_username if matrix_bot_draupnir_pantalaimon_use == 'true' else 'bot.draupnir' }}"
 matrix_bot_draupnir_password: "{{ matrix_bot_draupnir_pantalaimon_password }}"
 
 # Controls if we activate the pantalaimon config block for now. This configuration block is proable to change name for our usecase