diff --git a/cli.py b/cli.py
index 1fa1ba3..c21acfa 100644
--- a/cli.py
+++ b/cli.py
@@ -3,12 +3,9 @@ import json
 import click
 
 from query_performance_gauge import run_measuring_session
-from utils import compose_config
+
 
 @click.command()
-@click.option("--credentials", type=click.File())
-@click.option("--queries", type=click.File())
-@click.option("--config", type=click.File())
-def measure_performance(credentials, queries, config):
-    config = compose_config(config, credentials, queries)
-    run_measuring_session(config)
+@click.option("--config", required=True, type=click.File())
+def measure_performance(config):
+    run_measuring_session(json.load(config))
diff --git a/config_examples/legacy_full_config_file.json b/config_examples/mysql_config.json
similarity index 100%
rename from config_examples/legacy_full_config_file.json
rename to config_examples/mysql_config.json
diff --git a/config_examples/mysql_credentials_config.json b/config_examples/mysql_credentials_config.json
deleted file mode 100644
index 31990dd..0000000
--- a/config_examples/mysql_credentials_config.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-  "connection_details": {
-    "engine": "mysql",
-    "host": "the-sql-host",
-    "port": 3306,
-    "user": "your_user",
-    "password": "your_password",
-    "schema": "comprea"
-  }
-}
\ No newline at end of file
diff --git a/config_examples/mysql_credentials_with_tunnel_config.json b/config_examples/mysql_with_tunnel_config.json
similarity index 59%
rename from config_examples/mysql_credentials_with_tunnel_config.json
rename to config_examples/mysql_with_tunnel_config.json
index 5c3a911..8510894 100644
--- a/config_examples/mysql_credentials_with_tunnel_config.json
+++ b/config_examples/mysql_with_tunnel_config.json
@@ -14,5 +14,15 @@
       "path_to_key": "G:\\path\\to\\ssh\\key.pem",
       "ssh_private_key_password": "my_keys_password"
     }
-  }
+  },
+  "queries_to_measure": [
+    {
+      "name": "Fast Smoke Test",
+      "query_string": "SELECT 1"
+    },
+    {
+      "name": "Delivered carts on a day",
+      "query_string": "select * from comprea.cart c where c.status = 'delivered' and c.date_delivered >= UNIX_TIMESTAMP(date('2022-05-24'))"
+    }
+  ]
 }
\ No newline at end of file
diff --git a/config_examples/query_config_example.json b/config_examples/query_config_example.json
deleted file mode 100644
index bd256cf..0000000
--- a/config_examples/query_config_example.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-  "queries_to_measure": [
-    {
-      "name": "Fast Smoke Test",
-      "query_string": "SELECT 1"
-    },
-    {
-      "name": "Delivered carts on a day",
-      "query_string": "select * from comprea.cart c where c.status = 'delivered' and c.date_delivered >= UNIX_TIMESTAMP(date('2022-05-24'))"
-    }
-  ]
-}
\ No newline at end of file
diff --git a/config_examples/trino_config.json b/config_examples/trino_config.json
new file mode 100644
index 0000000..8cd8806
--- /dev/null
+++ b/config_examples/trino_config.json
@@ -0,0 +1,22 @@
+{
+  "connection_details": {
+    "engine": "trino",
+    "host": "the_trino_host",
+    "port": "443",
+    "user": "your_user",
+    "password": "your_password",
+    "http_scheme": "https",
+    "catalog": "app_lm_mysql",
+    "schema": "comprea"
+  },
+  "queries_to_measure": [
+    {
+      "name": "Fast Smoke Test",
+      "query_string": "SELECT * FROM system.runtime.nodes"
+    },
+    {
+      "name": "Delivered carts on a day",
+      "query_string": "select * from app_lm_mysql.comprea.cart c where c.status = 'delivered' and c.date_delivered >= to_unixtime(date('2022-05-24'))"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/config_examples/trino_credentials_config.json b/config_examples/trino_credentials_config.json
deleted file mode 100644
index 68d1ab7..0000000
--- a/config_examples/trino_credentials_config.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-  "connection_details": {
-    "engine": "trino",
-    "host": "the_trino_host",
-    "port": "443",
-    "user": "your_user",
-    "password": "your_password",
-    "http_scheme": "https",
-    "catalog": "app_lm_mysql",
-    "schema": "comprea"
-  }
-}
\ No newline at end of file
diff --git a/readme.md b/readme.md
index 714d9b1..5522b7e 100644
--- a/readme.md
+++ b/readme.md
@@ -16,32 +16,28 @@ You will install whatever version is in the shared drive at that point. Dependin
 might want to instead make a copy of the repository in your own local machine and install from there. That way, you 
 won't be affected by someone making `git checkout` in the shared drive.
 
-2. Afterwards, you need to make a credentials and a query config file. See below details on how to compose one.
+2. Afterwards, you need to make a config file. See below details on how to compose one.
 
 3. Once you have your config file ready, run the following command from the terminal.
 
 ```commandline
-measure_query_performance --credentials my_credentials.json --queries my_queries.json
+measure_query_performance --config my_config_file.json
 ```
 
 4. Results will be printed in your console as they are available. If instead you would like to store them in a file, a 
    quick and easy hack is to redirect output in Powershell to a file. You can do it like this:
 
 ```commandline
-measure_query_performance --credentials my_credentials.json --queries my_queries.json | Out-File -FilePath my_results.txt
+measure_query_performance --config my_config_file.json | Out-File -FilePath my_results.txt
 ```
 
-## Composing config files
-
-The application takes two config files: one for the credentials and connection details, one for the queries to run. 
-You can mix and match several of both (as in, you can run the same query set at different dbs, or you can have 
-multiple query sets run on the same database).
+## Composing a config file
 
 You can take a look at examples for different setups in `config_examples`. If you want to make a new config file, it
-will probably be easier for you to start from one of those templates. The legacy examples should be ignored unless 
-you want to understand outdated config files.
+will probably be easier for you to start from one of those templates.
 
 A few notes:
+
 - The valid engines are `"trino"` and `"mysql"`.
 - You can place as many queries as you would like in the `queries_to_measure` list.
 - I advice you to make the first query a silly, fast query such as `SELECT 1` to validate your connection and
diff --git a/utils.py b/utils.py
deleted file mode 100644
index 9d38aa3..0000000
--- a/utils.py
+++ /dev/null
@@ -1,32 +0,0 @@
-from typing import Union
-from io import TextIOWrapper
-import json
-
-
-def compose_config(
-    config: Union[TextIOWrapper, None],
-    credentials: Union[TextIOWrapper, None],
-    queries: Union[TextIOWrapper, None],
-) -> dict:
-    """
-    Receive the CLI arguments and compose a session config.
-
-    :param config: file pointer to a full config file.
-    :param credentials: file pointer to a credentials file.
-    :param queries: file pointer to a queries file.
-    :return: a dict with the composed configuration.
-    """
-
-    if config is not None:
-        DeprecationWarning(
-            "Usage of a full config file will be deprecated. Instead, use the credentials and queries arguments."
-        )
-        return json.load(config)
-
-    if credentials is None or queries is None:
-        raise ValueError(
-            "You need to provide both --credentials and --queries arguments."
-        )
-
-    # Merge both into one dict so it follows the same structure as a full config file
-    return {**json.load(credentials), **json.load(queries)}