diff --git a/src/main.Rmd b/src/main.Rmd
index 34c1f62..823e4fb 100644
--- a/src/main.Rmd
+++ b/src/main.Rmd
@@ -10,7 +10,7 @@ date: "`r Sys.Date()`"
 knitr::opts_chunk$set(echo = TRUE)
 ```
 
-```{r preamble, message=FALSE}
+```{r preamble, message=FALSE, include=FALSE}
 # Load Libraries
 library(dplyr)
 library(lubridate)
@@ -24,8 +24,8 @@ library(trajr)
 library(shiny)
 ```
 
-# Openskies API Functions 
 ```{r opensky, include=FALSE}
+# Openskies API Functions 
 
 time_now <- Sys.time()
 creds <- getCredentials(
@@ -52,8 +52,9 @@ getAircraftTrack <- function(icao, time, creds) {
 }
 ```
 
-## Trajectory Conversion Functions
 ```{r trajectory-functions, include=FALSE}
+# Trajectory Conversion Functions
+
 # Convert route to distance in meters
 getRouteDistance <- function(route_df) {
   lat_ref <- route_df$lat[1]
@@ -165,8 +166,9 @@ calculate_trajectory_params <- function(icao, departure_time, creds) {
 }
 ```
 
-## Statistical Helper Functions
 ```{r stat-functions, include=FALSE}
+# Statistical Helper Functions
+
 # Get parameter names and labels for trajectory statistics
 getTrajectoryParams <- function() {
   list(
@@ -202,8 +204,9 @@ calculateStatsSummary <- function(trajectory_stats_df) {
 }
 ```
 
-## Visualization Functions
 ```{r viz-functions, include=FALSE}
+# Visualization Functions
+
 # Create boxplots for trajectory statistics
 createBoxplots <- function(trajectory_stats_df) {
   p <- getTrajectoryParams()
@@ -313,10 +316,12 @@ This section demonstrates how to use all functions defined above. Each step is e
 
 The `getCredentials()` function loads API credentials from environment variables.
 
-```{r demo-credentials}
-creds <- getCredentials()
-has_creds <- nzchar(creds$client_id) && nzchar(creds$client_secret)
-cat("Credentials loaded:", has_creds, "\n")
+```r
+creds <- getCredentials(
+  client_id = Sys.getenv("OPENSKY_CLIENT_ID"),
+  client_secret = Sys.getenv("OPENSKY_CLIENT_SECRET")
+)
+
 ```
 
 ## Step 2: Fetch Airport Departures