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diff --git a/docs/_static/attempted-unauth-access.png b/docs/_static/attempted-unauth-access.png
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diff --git a/docs/auth.rst b/docs/auth.rst
index 34b80aa..97a0361 100644
--- a/docs/auth.rst
+++ b/docs/auth.rst
@@ -216,6 +216,32 @@ can also `join our Discord server <https://discord.gg/M3vjtHj>`__ to ask
 questions.
 
 
+++++++++++++++++++++++++++++++++++++
+Suspicious errors during signin flow
+++++++++++++++++++++++++++++++++++++
+
+All API endpoints require an approved app. When you app is first created and 
+anytime it's modified, it will go into state ``Approved - Pending``, a
+confusingly-named status indicating that the application is being manually 
+approved by Schwab. Until that status changes to ``Ready for Use``, you cannot 
+proceed using ``schwab-py``, and you will encounter difficult-to-debug errors. A 
+listing of the types of errors people have reported:
+
+ * ``401 Unauthorized`` errors in the signin flow
+ * ``4001``, ``Session rejected``, or ``assertion_rejected`` payloads
+ * ``Access Denied`` and ``You don't have permission to access 
+   "http://api.schwabapi.com/v1/oauth/authorize?" on this server"``
+
+.. image:: _static/access-denied.png
+   :width: 500
+   :align: center
+
+Approval appears to be  a manual process, and most users have reported 
+transitioning to the ``Ready for Use`` status within a few days. Please note 
+this behavior is implemented on Schwab's side, so the library authors have no 
+ability to influence this or speed up your approval time.
+
+
 .. _ssl_errors:
 
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
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diff --git a/docs/sp500.txt b/docs/sp500.txt
deleted file mode 100644
index 7945482..0000000
--- a/docs/sp500.txt
+++ /dev/null
@@ -1,504 +0,0 @@
-A
-AAL
-AAP
-AAPL
-ABBV
-ABC
-ABMD
-ABT
-ACN
-ADBE
-ADI
-ADM
-ADP
-ADS
-ADSK
-AEE
-AEP
-AES
-AFL
-AGN
-AIG
-AIV
-AIZ
-AJG
-AKAM
-ALB
-ALGN
-ALK
-ALL
-ALLE
-ALXN
-AMAT
-AMCR
-AMD
-AME
-AMGN
-AMP
-AMT
-AMZN
-ANET
-ANSS
-ANTM
-AON
-AOS
-APA
-APD
-APH
-APTV
-ARE
-ARNC
-ATO
-ATVI
-AVB
-AVGO
-AVY
-AWK
-AXP
-AZO
-BA
-BAC
-BAX
-BBY
-BDX
-BEN
-BF.B
-BIIB
-BK
-BKNG
-BKR
-BLK
-BLL
-BMY
-BR
-BRK.B
-BSX
-BWA
-BXP
-C
-CAG
-CAH
-CAT
-CB
-CBRE
-CCI
-CCL
-CDNS
-CDW
-CE
-CERN
-CF
-CFG
-CHD
-CHRW
-CHTR
-CI
-CINF
-CL
-CLX
-CMA
-CMCSA
-CME
-CMG
-CMI
-CMS
-CNC
-CNP
-COF
-COG
-COO
-COP
-COST
-COTY
-CPB
-CPRI
-CPRT
-CRM
-CSCO
-CSX
-CTAS
-CTL
-CTSH
-CTVA
-CTXS
-CVS
-CVX
-CXO
-D
-DAL
-DD
-DE
-DFS
-DG
-DGX
-DHI
-DHR
-DIS
-DISCA
-DISCK
-DISH
-DLR
-DLTR
-DOV
-DOW
-DRE
-DRI
-DTE
-DUK
-DVA
-DVN
-DXC
-EA
-EBAY
-ECL
-ED
-EFX
-EIX
-EL
-EMN
-EMR
-EOG
-EQIX
-EQR
-ES
-ESS
-ETFC
-ETN
-ETR
-EVRG
-EW
-EXC
-EXPD
-EXPE
-EXR
-F
-FANG
-FAST
-FB
-FBHS
-FCX
-FDX
-FE
-FFIV
-FIS
-FISV
-FITB
-FLIR
-FLS
-FLT
-FMC
-FOX
-FOXA
-FRC
-FRT
-FTI
-FTNT
-FTV
-GD
-GE
-GILD
-GIS
-GL
-GLW
-GM
-GOOG
-GOOGL
-GPC
-GPN
-GPS
-GRMN
-GS
-GWW
-HAL
-HAS
-HBAN
-HBI
-HCA
-HD
-HES
-HFC
-HIG
-HII
-HLT
-HOG
-HOLX
-HON
-HP
-HPE
-HPQ
-HRB
-HRL
-HSIC
-HST
-HSY
-HUM
-IBM
-ICE
-IDXX
-IEX
-IFF
-ILMN
-INCY
-INFO
-INTC
-INTU
-IP
-IPG
-IPGP
-IQV
-IR
-IRM
-ISRG
-IT
-ITW
-IVZ
-J
-JBHT
-JCI
-JKHY
-JNJ
-JNPR
-JPM
-JWN
-K
-KEY
-KEYS
-KHC
-KIM
-KLAC
-KMB
-KMI
-KMX
-KO
-KR
-KSS
-KSU
-L
-LB
-LDOS
-LEG
-LEN
-LH
-LHX
-LIN
-LKQ
-LLY
-LMT
-LNC
-LNT
-LOW
-LRCX
-LUV
-LVS
-LW
-LYB
-LYV
-M
-MA
-MAA
-MAR
-MAS
-MCD
-MCHP
-MCK
-MCO
-MDLZ
-MDT
-MET
-MGM
-MHK
-MKC
-MKTX
-MLM
-MMC
-MMM
-MNST
-MO
-MOS
-MPC
-MRK
-MRO
-MS
-MSCI
-MSFT
-MSI
-MTB
-MTD
-MU
-MXIM
-MYL
-NBL
-NCLH
-NDAQ
-NEE
-NEM
-NFLX
-NI
-NKE
-NLOK
-NLSN
-NOC
-NOV
-NOW
-NRG
-NSC
-NTAP
-NTRS
-NUE
-NVDA
-NVR
-NWL
-NWS
-NWSA
-O
-ODFL
-OKE
-OMC
-ORCL
-ORLY
-OXY
-PAYC
-PAYX
-PBCT
-PCAR
-PEAK
-PEG
-PEP
-PFE
-PFG
-PG
-PGR
-PH
-PHM
-PKG
-PKI
-PLD
-PM
-PNC
-PNR
-PNW
-PPG
-PPL
-PRGO
-PRU
-PSA
-PSX
-PVH
-PWR
-PXD
-PYPL
-QCOM
-QRVO
-RCL
-RE
-REG
-REGN
-RF
-RHI
-RJF
-RL
-RMD
-ROK
-ROL
-ROP
-ROST
-RSG
-RTN
-SBAC
-SBUX
-SCHW
-SEE
-SHW
-SIVB
-SJM
-SLB
-SLG
-SNA
-SNPS
-SO
-SPG
-SPGI
-SRE
-STE
-STT
-STX
-STZ
-SWK
-SWKS
-SYF
-SYK
-SYY
-T
-TAP
-TDG
-TEL
-TFC
-TFX
-TGT
-TIF
-TJX
-TMO
-TMUS
-TPR
-TROW
-TRV
-TSCO
-TSN
-TT
-TTWO
-TWTR
-TXN
-TXT
-UA
-UAA
-UAL
-UDR
-UHS
-ULTA
-UNH
-UNM
-UNP
-UPS
-URI
-USB
-UTX
-V
-VAR
-VFC
-VIAC
-VLO
-VMC
-VNO
-VRSK
-VRSN
-VRTX
-VTR
-VZ
-WAB
-WAT
-WBA
-WDC
-WEC
-WELL
-WFC
-WHR
-WLTW
-WM
-WMB
-WMT
-WRB
-WRK
-WU
-WY
-WYNN
-XEL
-XLNX
-XOM
-XRAY
-XRX
-XYL
-YUM
-ZBH
-ZBRA
-ZION
-ZTS