diff --git a/config.yaml b/config.yaml
index 512eeea6..58356387 100644
--- a/config.yaml
+++ b/config.yaml
@@ -7,6 +7,7 @@ PIDS: [nokia_0000003]
 
 # See https://www.rapids.science/latest/setup/configuration/#automatic-creation-of-participant-files
 CREATE_PARTICIPANT_FILES:
+  USERNAMES_CSV: "data/external/usernames.csv"
   CSV_FILE_PATH: "data/external/example_participants.csv" # see docs for required format
   PHONE_SECTION:
     ADD: True
diff --git a/rules/preprocessing.smk b/rules/preprocessing.smk
index 2f80ab4f..5a02361b 100644
--- a/rules/preprocessing.smk
+++ b/rules/preprocessing.smk
@@ -4,6 +4,14 @@ rule create_example_participant_files:
     shell:
         "echo 'PHONE:\n  DEVICE_IDS: [a748ee1a-1d0b-4ae9-9074-279a2b6ba524]\n  PLATFORMS: [android]\n  LABEL: test-01\n  START_DATE: 2020-04-23 00:00:00\n  END_DATE: 2020-05-04 23:59:59\nFITBIT:\n  DEVICE_IDS: [a748ee1a-1d0b-4ae9-9074-279a2b6ba524]\n  LABEL: test-01\n  START_DATE: 2020-04-23 00:00:00\n  END_DATE: 2020-05-04 23:59:59\n' >> ./data/external/participant_files/example01.yaml && echo 'PHONE:\n  DEVICE_IDS: [13dbc8a3-dae3-4834-823a-4bc96a7d459d]\n  PLATFORMS: [ios]\n  LABEL: test-02\n  START_DATE: 2020-04-23 00:00:00\n  END_DATE: 2020-05-04 23:59:59\nFITBIT:\n  DEVICE_IDS: [13dbc8a3-dae3-4834-823a-4bc96a7d459d]\n  LABEL: test-02\n  START_DATE: 2020-04-23 00:00:00\n  END_DATE: 2020-05-04 23:59:59\n' >> ./data/external/participant_files/example02.yaml"
 
+rule prepare_participants_csv:
+    input:
+        username_list = config["CREATE_PARTICIPANT_FILES"]["USERNAMES_CSV"]
+    output:
+        participants_file = config["CREATE_PARTICIPANT_FILES"]["CSV_FILE_PATH"]
+    script:
+        "../src/data/streams/translate_usernames_into_participants_data.R"
+
 rule create_participants_files:
     input:
         participants_file = config["CREATE_PARTICIPANT_FILES"]["CSV_FILE_PATH"]