Update README.

README.md

@@ -1,6 +1,8 @@
 # Google Analytics Extractor
 
-## Google Cloud API Access
+## Setup
+
+You will need Google Cloud API access for run the CLI:
 
 - Navigate to [Cloud Resource Manager](https://console.cloud.google.com/cloud-resource-manager) and click _Create Project_
     - alternatively create project with `gcloud projects create $PROJECT_ID`
@@ -18,18 +20,24 @@
     - email: SA email from earlier
     - role: _Viewer_
 
-Alternatively see <https://martinheinz.dev/blog/62>. 
-  
-## Running
+Alternatively see <https://martinheinz.dev/blog/62>.
+
+To install and run:
 
 ```bash
-python -m ga_extractor --help
+pip install ga-extractor
+ga-extractor --help
 ```
-
-Setup:
+  
+## Running
 
 ```bash
-python -m ga_extractor setup \
+ga-extractor --help
+# Usage: ga-extractor [OPTIONS] COMMAND [ARGS]...
+# ...
+
+# Create config file:
+ga-extractor setup \
   --sa-key-path="analytics-api-24102021-4edf0b7270c0.json" \
   --table-id="123456789" \
   --metrics="ga:sessions" \
@@ -39,34 +47,48 @@ python -m ga_extractor setup \
 
 cat ~/.config/ga-extractor/config.yaml  # Optionally, check config
 
-python -m ga_extractor auth  # Test authentication
-Successfully authenticated with user: ...
+ga-extractor auth  # Test authentication
+# Successfully authenticated with user: ...
+
+ga-extractor setup --help  # For options and flags
 ```
 
-Value for `--table-id` can be found in GA web console - Click on _Admin_ section, _View Settings_ and see _View ID_ field 
+- Value for `--table-id` can be found in GA web console - Click on _Admin_ section, _View Settings_ and see _View ID_ field
+- All configurations and generated extracts/reports are stored in `~/.config/ga-extrator/...`
+- You can also use metrics and dimensions presets using `--preset` with `FULL` or `BASIC`, if you're not sure which data to extract
 
-Extract:
+### Extract
 
 ```bash
-python -m ga_extractor extract
+ga-extractor extract
 # Report written to /home/some-user/.config/ga-extractor/report.json
 ```
 
-Migrate:
+`extract` perform raw extraction of dimensions and metrics using the provided configs
+
+### Migrate
+
+You can directly extract and transform data to various formats. Available options are:
+
+- JSON (Default option; Default API output)
+- CSV
+- SQL (compatible with _Umami_ Analytics PostgreSQL backend)
 
 ```bash
-python -m ga_extractor migrate --format=UMAMI
-# Report written to /home/user/.config/ga-extractor/cee9e1d0-3b87-4052-a295-1b7224c5ba78_extract.sql
+ga-extractor migrate --format=CSV
+# Report written to /home/user/.config/ga-extractor/02c2db1a-1ff0-47af-bad3-9c8bc51c1d13_extract.csv
 
-cat cee9e1d0-3b87-4052-a295-1b7224c5ba78_extract.sql | docker exec -i db psql -Upostgres -a blog
-```
+head /home/user/.config/ga-extractor/02c2db1a-1ff0-47af-bad3-9c8bc51c1d13_extract.csv
+# path,browser,os,device,screen,language,country,referral_path,count,date
+# /,Chrome,Android,mobile,1370x1370,zh-cn,China,(direct),1,2022-03-18
+# /,Chrome,Android,mobile,340x620,en-gb,United Kingdom,t.co/,1,2022-03-18
 
-This should be run against clean database, consider running following if possible
+ga-extractor migrate --format=UMAMI
+# Report written to /home/user/.config/ga-extractor/cee9e1d0-3b87-4052-a295-1b7224c5ba78_extract.sql
 
-```sql
--- THIS WILL WIPE YOUR DATA
-TRUNCATE public.pageview RESTART IDENTITY CASCADE;
-TRUNCATE public.session RESTART IDENTITY CASCADE;
+# IMPORTANT: Verify the data and check test database before inserting into production instance 
+# To insert into DB (This should be run against clean database):
+cat cee9e1d0-3b87-4052-a295-1b7224c5ba78_extract.sql | psql -Upostgres -a some-db
 ```
 
 You can verify the data is correct in Umami web console and GA web console:
@@ -76,13 +98,26 @@ You can verify the data is correct in Umami web console and GA web console:
 
 _Note: Some data in GA and Umami web console might be little off, because GA displays many metrics based on sessions (e.g. Sessions by device), but data is extracted/migrated based on page views. You can however confirm that percentage breakdown of browser or OS usage does match._
 
-## Testing
+## Development
+
+### Setup
+
+Requirements:
+
+- Poetry (+ virtual environment)
+
+```bash
+poetry install
+python -m ga_extractor --help
+```
+
+### Testing
 
 ```bash
 pytest
 ```
 
-## Building Package
+### Building Package
 
 ```bash
 poetry install